PCM = Power Control Module. It should be the Auxiliary Power Control Module, located behind right side of dadsh.
TCS = Transmission Control Switch.
The transmission control switch (TCS) is a momentary contact switch that is located on the end of the transmission control selector lever. Pushing the TCS will either disengage or engage the overdrive function of the transmission. If the OVERDRIVE is disengaged, the word OFF will illuminate on the transmission control selector lever.
I believe the wire for the TCS is shorting somewhere and it most probably is near the shift lever.
Saturday, June 26th, 2010 AT 7:32 AM