Question about 2002 GMC Envoy
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Posted on Jan 02, 2017
Ignition switch and neutral safety switch. Next time it happens wiggle thekeys in the ignition switch and try to restart.If it starts its probably the ignition switch. Then locate neutral safety switch on brake pedal and put meter on B+ wire from switch to starter relay and see if you get B+ on the would -be- crank. Next locate B+ wire from starter relay to starter hook a meter to it and see if you get B+ on the would -be crank.
Where ever B+ is missing is your problem.
Posted on Apr 14, 2010
SOURCE: what wires do I need
The wires on the Transmission Range Sensor that control the ability to crank the starter are the BLACK/GREEN wire at Pin 6 and the wire at Pin 10 which is either BLACK/GREEN or BLACK WHITE depending on your model. (build - date and transmission type)
With all that said, I think it only fair to warn you that bypassing these wires will set codes in your Engine Control Module. It is not going to like it if there is power at pin 10 with the transmission in reverse or any of the forward gears. This may also cause your transmission to not shift properly because the ECM will not know for sure what gear you are in.
Posted on May 10, 2011
Testimonial: "thanks so much for the information I will install a switch and only use it when needed and to ensure that this is my problem."
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