Quote Originally Posted by Fast355 View Post
Not sure which brake switch setup his truck had from the factory as GM switched to a single brake switch on the newer models, but both setups have a 12V output that is switched off when the brake is activated. His factory TBI setup had the same input that could have been used without a relay. Even my old 1983 G20 van that came with electronic/vacuum cruise had a cruise control brake switch that doubled as a vacuum release valve that had the correct output to feed the PCM.
That's good to know. I didn't see that feed. I did tap the feed that fed the brake lamp circuit.
Thanks again.

James