; Tarver, C. Cooling, Heating, Ventilation & A/C - AC compressor will not come on. Blowing fuses even after I unplugged compressor *SOLVED!!* Hello everyone!!!! Got a toughie. The air conditioning worked fine before testing. Pull out the diode and the clutch should still work without blowing the fuse. Odd thing, unplug the diode, fuse blowing goes away. Various cut-out switches were all working OK. The flyback diode keeps the electrons moving by shunting them back into the relay coil. I am getting no power to the AC compressor, so the clutch will not engage. 2-Wire GM A-C Compressor Clutch Connector. but how do I test powered? put 12v DC straight from the car battery to the power leads 3&4 on the relay? if so, any diodes? +/- to 3or 4 matter? then check for relay continuity? the service manual says to check for continuity across pins 1&2 when pins 3&4 are powered. i disconnected the ac wire from compressor and is still blowing fuses. Now, check out the relay diagram and pull the relay so you can match up the pins to the appropriate wires. Choose top quality brands AC Delco. A/C clutch diode. Now my compressor clutch is no longer working. The anode of the diode goes to the clutch terminal that is grounded (black wire). A diode can convert electric current from AC to DC or from Alternating Current to Direct Current. So that takes the clutch/diode out of the picture. A 12VDC relay, for example, may generate a voltage of. The diode should be built into the clutch, altho the 2008 drawing doesn't show it. Here is a simplified circuit to show the diode is connected between the positive line into the compressor clutch and ground: If the diode is "shorted" it will put a low resistance on the line into the clutch and "blow the fuse. Both fuses and the relay are located on BJB-Battery Junction Box, which is located above the radiator under the hood. So now where the problem lies is my number 49 fuse 15 amp keeps blowing I even tried a 20 amp fuse and that blows every time I turn on the AC within five. Electrical, Pneumatic, Hydraulic and Electronic Symbols Search for any Electrical, Pneumatic, Hydraulic or Electronic Symbols Click on any of the 59 categories of electrical, pneumatic, hydraulic and electronic symbols for more symbols. AC voltage creates electrical “noise” that can confuse electronic modules and digital communications. Soon after I noticed that the auxiliary radiator electric fan would run continuously once the car was switched on. If you just wire compressor directly to battery (with fuse) you'll also get same info that is the problem with compressor. A vehicle's air conditioning performance is reduced at low speeds and stop lights, but cools at highway speeds. ELECTRIC FAN RELAY HARNESS PART # 16763 A/C Clutch *This wire will allow you to turn on the Electric Fan every time the vehicles air conditioning is turned on. Because the electrons keep moving, the collapse of the magnetic field is slowed down, and the generated voltage will be much lower. Carknowledge. The coil of the relay is controlled by a Powertrain Control Module and is fed by a 15A fuse marked F1. - plugs into a connector shell which has the following set of wires going to it: Harness connector wire colors:. Disconnect battery. Since you can ground the relay coil and the A/C works you can rule out a couple of things like the compressor clutch fuse, relay and wiring to the compressor clutch. My A/C doesn't need freon and the computer reads code to replace A/C Clutch Relay. The cooling fan relay is activated and the fan operates. If it is, then check the fuse, #19 10 amp. 2 questions : 1à °) what happen if the clutch diode fails ? 2à °) If. i disconnected the ac wire from compressor and is still blowing fuses. I checked the fuses and found the AC Clutch fuse blown. Dear all experience people, I have 2003 Lincoln Town Car, it's been good with me since I had it brand new but last month the AC had problem and I already try the best to fix it but the compressor is still not engaging, if I connect directly pin 1 and pin 5 of the relay then the compressor was engaging and AC cold but I can't stop the compressor until turn off the engine. Diode is Wrapped. Many of our customers do not actually use their carts to play golf. The most frequently used method is to simply place a reverse-biased rectifier diode directly across the load as shown. The AC clutch is the same basic design as an electric PTO clutch. On these relays it's important not to reverse the 85 and 86 (coil) pins. T4 Zener Diode. I don't hear the clutch clicking on and of wich explains why there is no cold air. You search Auto repair manual PDF toyota 2004 corolla ac magnetic clutch relay location, if there are search results will appear below. Listing is for 1x 2 Wire GM Air Conditioning Compressor Clutch Connector Pigtail With Diode This connector is assembled with genuine OE GM/Packard/Delphi connectors and terminals. You would also need to replace the accumulator and orifice tube. When the car is off I can pull the ac fuse or relay out and you can hear the ac clutch click. It is the 4. The switches used to select air conditioning: defrost and a/c. Disconnect battery. Dodge 1500 A/C clutch fuse blows I bought a compresor from a junk yard for 2 bucks. It will be labeled Mag Clutch or have a picture of a snowflake. System was charged. The are polarity specific, so pay attention to that. When all conditions are met, the ECU provides power to the AC relay coil, and the AC compressor clutch is energized. The relay uses numbers 85 and 86 as the electromagnet control. A/C clutch relay too weak to initiate current demand, clutch windings weak, poor ground. 7l tivct) stoplamp relay (edge) 94 74 51 93 71 92 70 48 91 wiper relay 67 45 72 50 rea r window defrost relay blower motor relay starter relay rear seat. Please help, Thanks. I checked the wiring schematic and found it shows a diode around the AC compressor. 2) blow fuses/circuit breakers. 2005 Ford e350 air conditioning not working A shorted diode is another possibility. 1 oms, I took my old compressor and hooked up the connector to the clutch leaving the replacement hooked up to the engine, turned on AC and it was ok did not blow fuse and clutch would engage. And one of the best ways to do this is to use a multimeter with an ohmmeter setting and then measuring the resistance values. Choose Advance Auto Parts for A/C Compressor Diode Connector. There is no diode on this Zexel heavy duty clutch. 12v was showing up at the pigtail leading to the clutch. They design a fuse to burn or blow out, at an amperage below the point where damage occurs in the circuit. If this fuse is faulty the clutch will not energize. The A/C compressor clutch does not engage (but both fans run with the A/C on) 1. As the temperature of the coil drops the outlet pressure also drops. It is a new compressor with a new clutch but I wonder if it is faulty. All information, except fuses, will be placed within the graphical template in 9 pt. 05' f150 lariat 2x no power to a/c clutch,fuses good,bypassed both high & low press switches,swapped relays, w/key on, power on 3 of 4 terminals of a/c clutch relay? can power up comp on gry/wht wire at relay, comp turns on. Step 6: Find any refrigerant leaks. I need to replace the diode. Engine Compartment Fuse Block. since 1980. 30 amp fuse 86 30 87 85 optional 2nd relay overrides temp sensor and turns on fan when a/c is turned on temp sensor switch in radiator coolant or optional adjustable fan switch with radiator probe (ground. If you install the diode backwards you will: 1) possibly let the magic smoke out of the diode rendering it useless. Passenger Cars, Mini Vans, SUV Service and Repairs. Air conditioning systems, even with only mechanical systems, still have diodes on compressor clutches (sometimes). Try swapping that diode with the wiper diode #65, they ae the same. The shorted diode was blowing the fuse every time the circuit called for power to the clutch. The diode's job is to shunt the reverse current spike to ground when the clutch de-energizes. Order A/C Compressor Diode for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Control Boards; Door Cable; Door Gaskets. A 4 terminal relay is used so a low power circuit may engage a high power circuit without risk of damage to the low power control circuit. - normally open; has an internal diode. The fan will turn on when the AIC compressor activates. cakra321 34,468 views. Buy a 1996 Pontiac Grand Prix A/C Compressor Diode at discount prices. Resistor “r” acts to limit the current when the power is turned on the next time. (No Trucks) - Incessant clicking - on, off, on - of ac compressor clutch! - Have been told by two people that this is normal when vehicle's ac is. The fuse panel is located to the left of the steering wheel, near the brake pedal. The HVAC (Heating/Ventilating/Air Conditioning) System in the 928 started with a relatively simple system in the earlier cars, and only added a minimal automatic temperature control, optional at first, standard in the later cars. I have confirmed voltage through the whole length of the circuit all the way up to the wires coming out of the pto. How I fixed My Air Conditioning on 2008 Honda Civic - Duration: 2007 Honda Accord AC compressor clutch relay fix - Duration: 2:40. The diode is made into a plastic case with a wire coming out of each end. If so, than the relay would be working as intended and it may just be the warmer weather and the AC overcoming it If you feel it simply doesn't get cold and the AC relay works (AC clutch is working) than I would think your AC needs to be recharged. I have traced the problem to the diode in the PTO harness on the engine side. When all conditions are met, the ECU provides power to the AC relay coil, and the AC compressor clutch is energized. ph A830L LCD Digital Multimeter DC AC Voltage Diode Freguency Test Multitester Features: 100% brand and high quality 1. " cheapest Ac Clutch Diode Fuse. This is called rectification, and rectifier diodes are most commonly used in low current power supplies. 5 vtec v6 motor and the ac compressor wont work. 7l tivct) stoplamp relay (edge) 94 74 51 93 71 92 70 48 91 wiper relay 67 45 72 50 rea r window defrost relay blower motor relay starter relay rear seat. The fuse is normally mounted in a holder moulded as part of the relay body so it can be replaced if it blows. There is also not blinking on the control unit. For AC Clutches & Compressors, shop Advance Auto Parts. My son drives an 07 escape. The AC compressor relay is responsible for supplying power to the AC compressor and clutch. 06-14-07 01:49 PM - Post# 1185904 would the diode inline with the ac comp keep it from cycling ? i just changed the clutch and there's power to the clutch connector green wire, plenty of 134 and the fuses are good. Looking at the wiring diagram I see a bidirectional diode that runs between the two wires going to the clutch. F41 (100A) Battery. Every time I put a new fuse in it blows. The anode of the diode goes to the clutch terminal that is grounded (black wire). Usually, but not always. door lock relay. T4 Zener Diode. A likely cause for this DTC is a faulty A/C compressor clutch relay. My AC quit blowing cold air and I noticed my cruise control stopped working at the same time. very easy to do. 2) With engine running, AC on MAX, voltage at the AC relay is 12V but anywhere from 0. He called me from Atlanta Sunday headed back to Memphis and said his A/C was working great Saturday, but when they were leaving town Sunday it was blowing hot air. An evaporator discharge air temperature sensor is used to disengage the A/C compressor clutch when the evaporator core temperature falls below 4°C (39°F). SciTech Connect. A/C clutch diode. If the clutch engages, the fuse or relay was at fault. Halfords HEF560 Relay 12V 40A 4 PIN inc. Air conditioning clutch supply via air conditioning clutch relay on Diode: Air conditioning clutch: Relay. Is possible that a bad Diode could stop the A/C from working? And is there a way to test it? 2002 Venture 104,000km No way. The part number for the diode module is:. An evaporator discharge air temperature sensor is used to disengage the A/C compressor clutch when the evaporator core temperature falls below 4°C (39°F). Shock sensitivity of LX 04 at elevated temperatures. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35. Could this be a bad relay? I ohmed out the relay it seams to be fine. Almost every single electrical system on a car is powered through some kind of switch or electrical relay, and the AC system and compressor are no exception. Sent back and got another one and as soon as AC was turned on fuse blew again coil was shorted 0. A/C Clutch Fuse Keeps Blowing About a month ago i replace my entire Ac system in my 93 honda accord, hoses, compressor, condensor, evaporator etc. Engine coolant blower motor relay. I replace it and turn the ac back on and it blows the fuse in a matter of 1 minute. The A/C circuit is fairly complicated on the Civic and includes a bunch of sensors and switches. I checked and set the air gap to. Ford F150 Forum. not sure where to go from here?. If the diode is bad, replace it before running the AC very much. my ac clutch fuse keeps blowing as soon as i turn it on. a/c pressure sensor radiator fan a/c condenser fan a/c condenser fan relay test, blower motor relay test, radiator fan relay test, a/c compressor clutch relay test, fan control relay test, under-hood fuse/relay box a/c diode b a/c diode a lhd type is shown, rhd type is similar. Re: Ford F150 PCM Power Diode 1FB I orderded one from dealer. CL; ILX; Integra; Legend; MDX; NSX; RL; SLX; TL; Vigor; Aixam. Diode Protection: Diode/Thermal Fuse All Our Parts are Brand New and covered by the Original Equipment Manufacturer's Warranty We carry a full line of Sanden compressors, Seltec/Valeo compressors along with all other brands for Freightliner, Ford, Kenworth, Mack, Peterbilt, Volvo/GM Trucks, Caterpillar, Bus, RV and Van AC parts. There are several different compressor designs, but all perform the same function: they move, or pump the refrigerant throughout the system, and they compress the low pressure vaporized refrigerant into a high pressure vapor. The Ultimate Relay, Switch, Sensor, and Diodes Guide. there are no shorts from each prong. On these relays it's important not to reverse the 85 and 86 (coil) pins. E 1 Electronically Controlled Transmission Solenoid E 2 Engine Coolant Temp. I am attempting to get my daughters AC Working on here 97 GC. GM AIR CONDITIONING Compressor Connector Pigtail With Diode AC Clutch ACCOMP2-D - $24. This section will be in two-column format paced in a template format, edged bold. Your "I feel the load" test is fine but you can see the clutch come on by watching the clutch end plate on the end of the compressor. A/C signal circuit troubleshooting •HVAC DTCs •Blown fuse No. In this circuit, I doubt a missing diode will cause the fuse to blow, but it is possible. to 25,000 lb. Headlight Wiring Diagram 02 F250 w/DRL - Ford Truck Enthusiasts Forums Name: DRL. There's also one wire (clutch engauge) on the compressor. Re: Ford F150 PCM Power Diode 1FB I orderded one from dealer. Pulled a vacuum on the system and put in new gas. The Gray wire from the AIC relay goes to the +12 volt of the AJC compressor clutch wire. I have been under the dash and examined the fuse boxes located there and no luck on finding the AC fuse. From underneath the car, I managed to unclip the harness and check the voltage going to the clutch. Look for a relay diagram or a relay schematic that is printed on the side of the relay to determine. Without this relay, the AC compressor will not have power and the AC system will not function. The only reason I see to need a diode is if you are using your condensor fan as a backup fan if the radiator gets too hot (activated by a temp switch in the thermostat housing), then you would need a diode to prevent voltage from back feeding to the dash switch. In AC circuits a rectifier diode snubber cannot be used; if a simple RC snubber is not adequate a more complex bidirectional snubber design. The fuse panel is located to the left of the steering wheel, near the brake pedal. The system is charge correctly but the compressor wont engage. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35. Odd thing, unplug the diode, fuse blowing goes away. Swapped relays back and put in another fuse which again popped immediately. Is this what failed?. Find 1971 Vw Bug Fuse Box Wiring Circuit and Wiring Diagram 1971 Vw Bug Fuse Box Wiring Diagram for Circuit and Wiring @ getwiringdiagram. In a diode protected relay, Mini relays must be pin 85 (+) power, pin 86 (-) ground / Micro relays must be pin 2 (+) power, pin 1 (-) ground. H 2 Headlight RH. The are polarity specific, so pay attention to that. Sensor E 3 Engine Hood Courtesy SW. When the car is off I can pull the ac fuse or relay out and you can hear the ac clutch click. It was blowing the 20 amp fuse when I turned on the PTO. Honda Relay Testing - Duration. It was a Dorman from rockauto. The 2010 Ford F-150 has 2 different fuse boxes: Passenger Compartment Fuse Panel diagram; Power Distribution Box diagram * Ford F-150 fuse box diagrams change across years, pick the right year of your vehicle:. The fuse to the compressor is an inline one located where the wire comes out of the nose clip along with the ac hoses. I use a cheapie blue horse shoe magnet from Radio Shack and a 240VAC relay coil and easily detect the 6 sec. A car AC compressor failure will not engage and will often lead to skipping and squealing caused by the friction of the belt. I tried putting a 1N4004 diode right by the clutch. Eventually, it will just blow warm air. For added protection, a clamping diode module is integrated into the pigtail assembly. Fuse #1 under the hood, 30 AMP AC Condenser Fuse, blows whenever the air conditioner is turned on. Symbol shows a Transient Voltage Suppression diode. Chevrolet Cavalier Climate Control/AC Issues. I have a 94 Mustang Gt full cobra clone. The AC Relay is located external to the controller. - I've read a lot about this issue, but can't figure it out. 5 vtec v6 motor and the ac compressor wont work. Shock sensitivity of LX 04 at elevated temperatures. Car has been running for 20 minutes. ELECTRIC FAN RELAY HARNESS PART # 16763 A/C Clutch *This wire will allow you to turn on the Electric Fan every time the vehicles air conditioning is turned on. Good Night; i have a 2005 Honda odyssey 3. 01 gtdi) compressor clutch diode (3. When a solar cell is deprived of light, it no longer generates DC power. Some germanium diodes have a voltage drop ranging from 0. door lock relay. Hardware & Adapters AC Connectors A/C Compressor Diode A/C Compressor Clutch Hold-In Relay. Our vast inventory and technical knowledge enables us to help any customer with their needs. Welcome to Ogura Industrial Electromagnetic Clutches and Brakes Ogura Industrial Overview Video Ogura offers clutches and brakes for applications requiring. I used a 10 amp auto breaker and also used a 15 amp fuse to make sure the circuit is protected. The clamping diode is needed to prevent voltage spikes. Here is a simplified circuit to show the diode is connected between the positive line into the compressor clutch and ground: If the diode is "shorted" it will put a low resistance on the line into the clutch and "blow the fuse. You found a shorted diode, the reason for blowing ac fuses. Save a/c clutch diode to get e-mail alerts and updates on your eBay Feed. One end of the case is marked with an "X", and the other end is marked with a "Y". If the A/C diode on the fuse panel is reversed would it stop the compressor clutch from being enganged? I had my A/C serviced and filled but the compressor clutch would not engage. cakra321 34,468 views. I checked the wiring schematic and found it shows a diode around the AC compressor. I checked to make sure the none of the wires were rubbing. Air Conditioning Relay: Additional FRH required. now this time use a 12 volt source without the light and back probe the + POSITIVE wire this should energize the ac clutch, you should here a loud click if you do start the truck and again send 12 volts to the positive side of the compressor and see if the clutch locks up and starts running if so then only run that for 2-3 seconds that is to. Once you are clearly detecting the 6 second background noise you've reached the point of diminishing returns anyway. Air Conditioning Diode Fuse Relay - 5 Pack. Contact the manufacturer directly for a quote. This system doesn't use a diode on the clutch circuit or at least I cannot find one on the wiring diagrams. Battery Parts & Chargers. 5 vtec v6 motor and the ac compressor wont work. Commonly used with many 1986-newer GM vehicles. There are approximately 3,000 different clutch models available. E 1 Electronically Controlled Transmission Solenoid E 2 Engine Coolant Temp. Unplug the connector from the compressor clutch and remove the fuse. A working diode is invisible to the ac circuit until power is removed from the clutch coil. The HVAC switch (#30 fuse/Switch) from the interior fuse panel I did swap out and then tested but to no avail, it seems to be working fine but it is very hard to get a test light onto the tester switch box leads. And at one time there is a pressure switch on the inner left frame rail that I disconnected and when I put the fuse back in, everything was ok. A faulty compressor clutch relay. "Today, if you do not want to disappoint, Check price before the Price Up. The anode of the diode goes to the clutch terminal that is grounded (black wire). Your vehicle deserves only genuine OEM Ford parts and accessories. The cheater wire bypassed a relay where the AC switch controls the electrical path but took power from the 20A fuse which then did not blow! So now I am thinking it is the AC switch or the Relay, which I will replace tomorrow morning when it is less than 100 degrees outside. - sometimes labeled or described in manuals and diagrams as a "clutch switch unit", a "neutral safety relay", or an "ignition cut-off" relay. On speed/direction control assembly (5, figure. 2005 Ford e350 air conditioning not working A shorted diode is another possibility. I know what a regular diode is for but I have no idea what this diode does. cakra321 34,468 views. The Need for Transient Suppression When an electromechanical relay is de-energized rapidly by a mechanical switch or semiconductor, the collapsing magnetic field produces a substantial voltage transient in its effort to disperse the stored energy and oppose the sudden change of current flow. Obviously the ECM isn't grounding the relay so let's start there and work backwards. Could it be the A/C clutch relay or is it something more expensive like the entire compressor?. I probed the connector going to the A/C clutch and it shows around 8 volts when the car is on. There are several different compressor designs, but all perform the same function: they move, or pump the refrigerant throughout the system, and they compress the low pressure vaporized refrigerant into a high pressure vapor. The pressure cycling switch. Examining Air Conditioning Clutch Failures in the Field This guide can be used as a reference to diagnose clutch failures, and is specifically designed to help you differentiate between unwarrantable clutch failures and those that would normally fall under possible warranty consideration. The coil of the relay is controlled by a Powertrain Control Module and is fed by a 15A fuse marked F1. The function of the diode is to protect the relay contacts from a spark that would arc across them when the relay opens. The diode suppresses the spark. The sometimes over half century old original silicium AC/DC converters possess the bad habit of permanently sapping your battery's power, so discharging it to a state of under 5. You should first check the AC fuse, and then the AC diode. Honda Relay Testing - Duration. • Without proper suppression, the operating life of an electric brake or clutch may be. It is a new compressor with a new clutch but I wonder if it is faulty. Connect the negative battery cable with the socket. Bourns, Inc. The diode does not conduct when the A/C clutch is energized. It is in the reverse biased position when the relay is turned on; therefore no current will flow through the diode. The fan switch. Commonly used with many 1986-newer GM vehicles. how to check clutch relay? shall36: I pulled the clutch relay. The diode can be tested with an ohm-meter. The fan controller also has a lead that can be connected to the air conditioning compressor clutch power wire to turn on the fan whenever the A/C is turned on. A/C signal circuit troubleshooting •HVAC DTCs •Blown fuse No. For added protection, a clamping diode module is integrated into the pigtail assembly. The AC system is closed and should not leak nor should the refrigerant be low. If you are just checking for blowing fuses you can unplug the. For eight decades, Littelfuse has been developing industry-leading circuit protection products by working closely with their customers. A good forward-based diode displays a voltage drop ranging from 0. 1998 Ford Contour Fuse Box Diagram. The coil of the relay is controlled by a Powertrain Control Module and is fed by a 15A fuse marked F1. In my case the fuse #48 keeps blowing because I has the ac clutch diode which is #90. Connect the negative battery cable with the socket. 2) With engine running, AC on MAX, voltage at the AC relay is 12V but anywhere from 0. There is an antispike diode connected in parallel with a clutch. If you install the diode backwards you will: 1) possibly let the magic smoke out of the diode rendering it useless. A working diode is invisible to the ac circuit until power is removed from the clutch coil. ELECTRIC FAN RELAY HARNESS PART # 16763 A/C Clutch *This wire will allow you to turn on the Electric Fan every time the vehicles air conditioning is turned on. T4 Zener Diode. When the relay control circuit is opened (turned OFF), current stops flowing through the coil, causing the magnetic field to collapse. Dodge 1500 A/C clutch fuse blows I bought a compresor from a junk yard for 2 bucks. door lock relay. Fuse box diagram (location and assignment of electrical fuses and relays) for Ford F-53 Motorhome Chassis / F-59 Commercial Stripped Chassis (2013, 2016, 2017). So I replace the small 5 amp fuse in the passenger kick panel and I replaced all the fuses under the hood that said AC I also went to AutoZone and bought a new 7018 relay for the AC clutch. D4 Engine cooling fan (air conditioning) 7. Amazon Com Galco Side Snap Scabbard ". 2005 Ford e350 air conditioning not working A shorted diode is another possibility. Honda Motorcycle Wiring Color Codes. The a/c compressor clutch coil inside your car is an electromagnet that attracts both the fan belt and air conditioning rotors. Air conditioning systems, even with only mechanical systems, still have diodes on compressor clutches (sometimes). It will be labeled Mag Clutch or have a picture of a snowflake. Just trying to understand where the reverse ,high voltage, enough to blow it came from. Check the clutch fan. From some reading I am leaning to it being the AC Clutch Coil or the wiring to the coil. Order Halfords HEF560 Relay 12V 40A 4 PIN inc. We have the largest selection of Saturn L Series AC Compressor Clutch parts at discount prices. F44 (7,5A) Headlamp high beam relay (with daytime running lamps) F45. If so, than the relay would be working as intended and it may just be the warmer weather and the AC overcoming it If you feel it simply doesn't get cold and the AC relay works (AC clutch is working) than I would think your AC needs to be recharged. It still blows the fuse. Initially the fuse doesn't blow until the compressor has had some time to warm up and is pulling less amperage. 30 amp fuse 86 30 87 85 optional 2nd relay overrides temp sensor and turns on fan when a/c is turned on temp sensor switch in radiator coolant or optional adjustable fan switch with radiator probe (ground. I have confirmed voltage through the whole length of the circuit all the way up to the wires coming out of the pto. Any idea if an 08 Jeep Patriot even has an ac clutch relay or if it's just called something else. Note: Kit may come in two configurations. Air Conditioning Relay: Additional FRH required. The fuse still blew. Paragraph 4 The AC compressor clutch has a built in diode. • Without proper suppression, the operating life of an electric brake or clutch may be. Your "I feel the load" test is fine but you can see the clutch come on by watching the clutch end plate on the end of the compressor. Many ac diodes short and allows battery voltage thru to ground, blowing the fuse immediately. AC Clutch Circuit Breaker Z505 for CX Troubleshooting. The diode should be built into the clutch, altho the 2008 drawing doesn't show it. It would not disengage. A 4 terminal relay is used so a low power circuit may engage a high power circuit without risk of damage to the low power control circuit. Obviously the ECM isn't grounding the relay so let's start there and work backwards. I checked the fuse box under the hood and one of them says AUX FAN so I'm assuming that has to be it. Carknowledge. i have checked all the fuses and none are blown, i switched diodes nothing, i unplugged the clutch harness at the compressor and put my meter on it and got no voltage while on max ac, checked r134a levels are good. very easy to do. Year of production: 2005, 2006. GENERAL MOTORS DIODE INSTALLATION When replacing an AC compressor clutch diode with a new GM diode, the part does not come with an instruction sheet on how to install. Thanks for your effort bro. The fuse box is located on the passenger side of the engine compartment next to the strut tower. AC Compressor Operation.