CavalierStarting in the 1980s. the Cavalier made a name for itself by offering an affordable 2 and 4 door compact. Platform: J-body
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Got 5 volts on the yellow wire. I put a paper clip in the plug as a jumper and started the car. No p0117 and the temp gage did the exact same thing.
Well, I guess tech2 is correct. If you jumpered full voltage to the switch leg, and if it were a complete circuit, you should have pegged the temp guage. I'd first before tearing the wire harness apart, is to use an electrical cleaner, and spray the connections well.