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Re: Code 39, 1985 Cadillac, What set's it?
Posted to Technical Discussion Forum on 3/6/1999 1 Reply

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Ron,

the best way I have found to check for a bad TCC solenoid on this car is to put the pcm in output cycling and connect a current probe around the purple(TCC cir) wire at the brake switch. Look f... Login to read more.

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