Quote:
Originally Posted by ls1nova71
You'll need a 4 prong brake light switch, the kind used for cruise control in the 70's and 80's. They have 2 sets of contacts, one normally open and one normally closed. The TAC ties into the cold side of the brake light wiring and the PCM side will be the other set that needs ignition power and will send power to the PCM when the brakes are not applied.
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Ive been away from the cruise diagnosis. No i didn't crash my truck trying to set the cruise at 90+, LOL. Job change, out of state trip etc.
Anyhow I went to check power at pin 33 of the blue PCM connector and I don't have a wire there. For reference I have another harness for my 5.3 4L60E build and it has that purple wire in blue33 tagged for TCC. Would I still need that wire with my manual trans?
I did pick up a 4pin brake switch, but not sure how to wire it since I don't have the purple wire?