Pontiac Repair/A/C Relay


QUESTION: There are 5 relays behind the headlight under the hood of my 1995 Pontiac Transport.  Which one is the A/C compressor relay.


look at the wiring on the relays which ever one has a darg green wire on it will be the one for the a/c compressor. the green wire is the power feed going to the compressore clutch.
good luck :-)

---------- FOLLOW-UP ----------

QUESTION: I found the relay and checked it.  It works perfectly.  Where does the coil voltage for the relay come from?  On the Circuit breaker/Relay panel, there is a 15 amp fuse in position 2 (With 3800 V6 engine only: Canister Purge Solenoid, A/C Clutch Control Relay, Cruise Control.  This fuse blows when the A/C switch is turned on and causes the service eng lite to come on. Does the coil voltage pass thru this fuse?

Yes your are correct. unplug the compressor clutch at the cluth obviously do it with the engine off. then replace the fuse start the van up and turn the a/c on if the fuse doesn't blow the coil is shorthed out for the compressor cluth. if it still blows there is a short between clutch and the fuse and you need to narrow it down more but my guess is the clutch coil is bad. You need all kinds of special tools to replace the coil and there is a spec that needs to be set between the clutch hub/pulley and the clutch which is critical and again If I were guessing the cluthc and hub are bad as well as the coil so a complete compressore is less of a aheadache for you.
good luck :-)

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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