67 C-10 won't turn off - The 1947 - Present Chevrolet & GMC Truck Message Board Network

stock67 · 01-12-2011, 09:48 PM

I have a stock inline 250 67 Chevy C-10 with 90K original miles on it. I replaced the headlight switch a few weeks ago and shortly afterwards the truck wouldn't turn off. I can turn off the ignition switch off and remove the key but the engine keeps going. I replaced the ignition switch, but that didn't change the problem. I have checked the starter motor for any loose or fried wires and checked the wiring harness for any damage, none found. A few years ago I replaced the stock ignition with an HEi unit, other than that the engine is stock. The wiring on the truck is stock and unmodified. Any ideas of what I can do to fix this problem?

Shyguy · 01-12-2011, 10:15 PM

Find the wire that runs to the HEI under the dash and put a toggle switch in it. This would be a temporary fix.

My '67 does not have an operating ignition switch. We ran a toggle switch and a push button for now until I start the restoration.

Longhorn Man · 01-12-2011, 10:31 PM

how is the HEI wired?

sneakysnake · 01-13-2011, 01:41 AM

Sounds as if your getting a backfeed or have a wire where its not supposed to be. Try unhooking the alt, and see if its not the problem. The other is the wire that went from the coil to the starter sol "I" terminal may be hooked up wrong and with HEI doesnt even need to be hooked up.

01-12-2011, 09:48 PM	#1
stock67 Registered User Join Date: Jan 2011 Location: high desert, NV Posts: 1	67 C-10 won't turn off I have a stock inline 250 67 Chevy C-10 with 90K original miles on it. I replaced the headlight switch a few weeks ago and shortly afterwards the truck wouldn't turn off. I can turn off the ignition switch off and remove the key but the engine keeps going. I replaced the ignition switch, but that didn't change the problem. I have checked the starter motor for any loose or fried wires and checked the wiring harness for any damage, none found. A few years ago I replaced the stock ignition with an HEi unit, other than that the engine is stock. The wiring on the truck is stock and unmodified. Any ideas of what I can do to fix this problem?

01-12-2011, 10:15 PM	#2
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: 67 C-10 won't turn off Find the wire that runs to the HEI under the dash and put a toggle switch in it. This would be a temporary fix. My '67 does not have an operating ignition switch. We ran a toggle switch and a push button for now until I start the restoration. __________________ '67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E.

01-12-2011, 10:31 PM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: 67 C-10 won't turn off how is the HEI wired?

01-13-2011, 01:41 AM	#4
sneakysnake It's a catastrophic success. Join Date: Jan 2003 Location: Oklahoma Posts: 2,077	Re: 67 C-10 won't turn off Sounds as if your getting a backfeed or have a wire where its not supposed to be. Try unhooking the alt, and see if its not the problem. The other is the wire that went from the coil to the starter sol "I" terminal may be hooked up wrong and with HEI doesnt even need to be hooked up.

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