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
04 Lightning Pullies n Tune CAI
96 Formula WS-6 m6 383 LE3-Heads/GM847/N2O/ Ford 9" 4:33/Sus Work/Stickies/TunerProRT
93 K1500 383 LT1 with Low RPM 4x4 torque cam
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