Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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When it will not crank if you get under the car and the stater with a helper holding the key in the crank position are you getting battery voltage at the purple crank wire from the ignition switch?
Okay, are you working on a standard transmission or an automatic?
Okay when you by passed the clutch switch did you get key on cranking power on the yellow/black wire at the switch ?
Okay, have a look at the enclosed wiring diagram to check the circuit. While the problem is occurring start with checking the yellow/black wire and if you find no power there then move to the stater enable relay on the left side of the dash and see if you have power into it on the yellow from the ignition switch and let me know what you find..https://dl.dropboxusercontent.com/u/104923897/Corvett%20Start%20circuit%20Oct%2017.pdf