Backwards. The cruise control side works just like a brake light switch, when the pedal is pushed the circuit is closed get's the 12 volts (yellow and white wire on Dakota Digital CRC-2000). The ECM side has 12 volts until the pedal is pushed then the circuit opens. At least that's the way it works on the LT4 and 5 engines. This switch is used to unlock torque converters when the brake is pushed on conversions too I believe.Thanks! When the pedal is not pushed in the cruise circuit is closed and the circuit to the PCM is open, correct?
I'm using a new harness, those plugs came from the old harness brake light and clutch safety switch on that harnessNo need to look for pinouts, I was just wanting to know about the 2-wire plugs but I just reread your post and see that you found them on an old harness.
Yes, the brake light switch deactivates the cruise control and also the set of contacts on the clutch switch that I used which is an open circuit when the clutch is not pushed deactivates the cruise control. If you didn't have this switch, the engine would rev up when you push in the clutch to slow down to try to maintain speed.I have a LT4 with a manual transmission. I do not have my wiring harness yet, but I downloaded the instructions. The GM crate engine control system kit instructions state to install a switch on the clutch pedal. When the clutch is depressed, a signal is sent to the ECM to briefly disable fuel which will decelerate the engine to make shifting the transmission easier.
The instructions have the ECM wiring pin outs. ECM, cavity 64, circuit C 20, yellow wire, is labeled Top of Travel Clutch Switch.
I cannot find any references for a brake switch being wired to the ECM. Do you think the brake switch is only used for an automatic transmission or, the LT4 and LT5 are a different in this aspect?
Edit: I think you answered my question. The brake pedal switch deactivates the cruise control.
We have an extra 25 and short a 10amp fuse. Glad we caught it, hope the diagram is right!Looks like you have to double check everything. Wrong rated fuses installed in 2, 9, 13 and 14.