AboutRay Niemi Expertise ASE Master Rated. Ask any questions about Volvo models up to 2000. Runnability, starting and charging system, diagnostic codes, brakes, front end, where to get certain parts. Should I buy this Volvo or not? I will try to answer your question and give you the knowlege to make the best decision in your case.
Experience I started working on Volvo's in 1978 at the dealer and attended all the schools and achieved a Master rating. Since 1999 I have worked at independent shops and now own my own shop.
Organizations Alldata on line repair manuals. IATN network of techs.
ASE rating of Master.
Question where are the power and compressor and sensor wires at on the compressor.how do I tell the different
Answer Jim,
Just look at the compressor you will see the power wire some are green, and some need a ground that is black.
Some models have a drier in the system that have a pressure sensor on it and has wires running to it. Other models have a sensor in the high side pipe also has wires to it, and a sensor in the low pressure line also with wires. The wires that come out of the wire harness are power wires and the wire that will go to the block are grounds. Some models that have a sensor in the low side pipe or on the drier are wires that if the pressures are ok allow current to pass through and complete the circuit.
