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Pontiac Repair/1997 gtp a/c
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Question
compressor wont come on unless i jumper a ground to the relay,then it works fine,freons good.any ideas to start troubleshooting.3800 supercharger,dual climate controls.
Hi Rich:
Well it can be a bunch of things. either the HVAC control head is not sending the a/c request signal to the engine computer. The engine computer is not allowing the relay to be turned on due to another fault some where. ARe any codes stored in the engine computer? there meay be a code stored that would inhibit a/c compressor control. there could be a wiring issue between the hvac control head and the engine computer or a wiring issue between the engine computer and the compressor relay. That year car had issues with a wire harness rubbing through on the A/C condenser take a look and make sure that the engien harness is not rubbed trough at the A/C condenser. If you have a acatual scan tool and not a "code reader" you can lookto see if the a/c compressor request is present or not. Good luck :)
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Todd Puccio
Expertise
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
Experience in the area:I have been employed by the same Gm dealer for 18 years and and a ASE master technician. I work at a Pontiac and GMC truck store. 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
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
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