The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 68 C10 Yellow wire from firewall to starter/coil.

ray_mcavoy · 04-04-2011, 08:57 PM

Hi 68_GMC,

My first guess would be that your ignition switch has gone bad. In other words, the electrical contacts inside the switch are staying on even though you've turned the key off.

That'd explain the engine continuing to run with the key off, as well as the dead battery after sitting overnight.

04-04-2011, 08:57 PM	#7
ray_mcavoy Registered User Join Date: Nov 2009 Location: Sherman, ME Posts: 2,354	Re: 68 C10 Yellow wire from firewall to starter/coil. Hi 68_GMC, My first guess would be that your ignition switch has gone bad. In other words, the electrical contacts inside the switch are staying on even though you've turned the key off. That'd explain the engine continuing to run with the key off, as well as the dead battery after sitting overnight.