GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
I havent tried this myself but what it looks like you would need to do or provide to the wiper motor is:
Black wire is ground at all times key on or off
Purple wire is power only when you want wipers in high speed
Orange wire needs power when all others do not have power to put the wipers into park position to turn them off
Grey wire needs power only when in low speed position.
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