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Dose the system cool once the relay has been jumped?Is this a Manuel system (knobs) or an automatic (buttons)?
Yes Im here . The problem you are having can be caused by any of the following,
You should have power (key on) on the 2 pins at the relay from fuse 56 (20 AMP) and the ECM (computer ) supplies the ground to energize the relay . Once the relay is energized you should have power out to the clutch. Do you have power at both power pins at the relay?
Okay dose the relay energize if you ground the red/black wire from the ECU?
Yes but you can ground the wire at the relay. Try grounding it and see if the clutch kicks on.
On your the ECU should be in the right side kick panel.
No, you can slip a small ground wire in under the relay and ground the pin at the relay.
If you look at the wiring diagram I sent you , you will see the AC clutch relay is not under the dash. Its located in the under hood panel. The AC clutch relay is the relay Im taking about.
Okay are you sure you have power at both power pins (key on)?
Okay if you have power on both pins and a good ground from the ECU then the relay should kick in and send power out on the red wire. Are you sure the relay is not bad?
Okay go back and make sure you have key on power on both power pins and a good ground on the the red/black wire and power out on the red wire to the clutch. If you do then the clutch should run.
Yes start the engine, turn the AC on and then check the powers and ground at the relay and out of the relay to the clutch on the red wire.
You only pull the relay to check the two power pins, if you have power on them the place it back in and back probe it to check the ground and power out.
Yes just the two power pins, the relay dose not need to be in place to check them.
Yes verify you have power on both power pins, then reinstall the relay and check for ground from the ECU on the red/black wire and power out on the red wire to the clutch.
Yes you do this at the AC clutch relay.
If you can not back probe them at the relay then yes, pop the fuse box up and access them from underneath.
You need to do what ever it take to access the pins with the relay in place. How else are you going to know if there is ground in and power out.
You should be able to trace it in from the harness. It looks just like the wiring diagram I sent you.
Yours should match the wiring diagram.
It should be red/black witch usually means its red with a black tracer.
The diagram shows it as back/red , have you looked at the wiring diagram?
Okay Im not sure where to send you now, the system should match the factory wiring diagram. If you would like I can open the post back up for you. Perhaps someone else has something else to offer.
Yes, the black wires with the red tracers should be the correct color.
It could be both, if you look at the bottom of the panel where the relay goes in you would be able to trace it from there.
Okay the ground is supplied from the computer and if the computer is not grounding the relay it will not engage. Have you by chance scanned the system to see if there are any fault codes setting for the AC?
Okay if everything else checks out okay that usually means the problem is with the ECU.
Okay then the ECU is not supplying a ground to the relay and if you have done your testing correctly that usually means the ECU is at fault.
Okay are you getting a ground from the ECU to the relay?
Yes I under stand that but is the ECU sending a ground to the relay with the system running?
Okay, the ground to the relay comes from the ECU to ground the relay.
Okay then the relay should engage and the clutch should kick on.
Well if you have power on both power pins and a good ground from the ECU to the relay then it should energize and send power out to the AC clutch. Are you sure you have a good ground from the ECU to the relay?
Its not likely if you have power in and out at the back of the panel with the relay in place.
As I have said, you need power at the two power pins, and a good ground from the ECU to the relay and if you have this, the relay should power on and send power out to the clutch. Are you 100% sure you have these?
I am pretty sure I asked you about the relay some time back. have you tired a known good relay?
Okay if you have power at both power pins and a good ground from the ECU the compressor should kick in.
Okay are you 100% sure you have power at both power pins and a good ground from the ECU the compressor?
ECU to the relay, the ECU supplies the ground to the relay just like its shown in the wiring diagram.
Im afraid I would agree with the testing skills , no offense. At the relay there should be 2 pins with key on AC on that should read power, and to energize the relay (turn it on) the ECU (computer) supplies the ground on the Black/red wire. Once the ECU supplies the ground then the relay should kick in (turn on) and supply power out of it on the red wire to the AC compressor clutch.
What did you figure out on your retesting?
As I have said, if you have power at the relay on both power pins and a good ground from the ECU then the relay should engage. Did you ever decide if you have power and ground at the relay?
You can use either one, the volt meter work best for checking voltage though.
That is correct, it will not show you the actual voltage and thats why a volt meter is best for testing.