The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1972 C20 will not start/seems like no electic power

RichardJ · 07-11-2017, 08:41 PM

>>I followed the purple wire from the ignition to outside the firewall (0.9v)<<

Inside the firewall connector, that purple wire goes to the Neutral safety switch and from there to the Ignition/Start switch which is where it gets its 12 Volts for the starter solenoid.

My first check would be the Neutral safety switch for voltage on both terminals with key in "start".

07-11-2017, 08:41 PM	#5
RichardJ Registered User Join Date: Apr 2010 Location: So Cal Posts: 1,489	Re: 1972 C20 will not start/seems like no electic power >>I followed the purple wire from the ignition to outside the firewall (0.9v)<< Inside the firewall connector, that purple wire goes to the Neutral safety switch and from there to the Ignition/Start switch which is where it gets its 12 Volts for the starter solenoid. My first check would be the Neutral safety switch for voltage on both terminals with key in "start". __________________ '67 GMC 2500, 292, 4spd, AC