1964 GMC 3/4 ton build :D

[sdwolff98]

well going back to an issue I found on the cruise to Dallas and back.. Cruise control was not working. So now that i have some times going to start tackling that problem on this truck. gmt400/gmt800 have an issue with LED lights and cruise control working. So that is one things to look at. Also ECM C1 pin 33 is another item to look at. Pin 33 needs 12 volts when the brake lever is not pressed. Will be testing that circuit tomorrow night now that I have the volt meter in a spot I can see it while pressing the brake lever . Also found a nice terminal that slides in the 8.1 ecm without damaging the terminal as well. Here are some pics. The tac module is getting the 12 volt brake light power so i may need to place a 6 ohm resistor somewhere in the harness. Thank heavens I built the entire harness modularly. So I can take out the tac/ throttle body wiring without removing the entire engine harness ROTFLMAOOO!!!! I used a 2 pin Delphi/aptiv sealed 2 pin connector for the ECM to tac communication wires I did a similar connector for the ECM to Transmission control module as well. Here are some pics of what I have setup for tomorrow night. the terminal is an MP100 delphi male terminal. I had some from back when I was buying up left overs from GM dealers in washington state lol

Sean