The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Help- both turn signal indicators turn on when lights are on

Cape Codder · 10-12-2015, 02:55 PM

The first place to look for wiring issues is any place someone has fooled with the factory harness. The next thing to do would be to try disconnecting circuits till the lights go out. Have you pulled the running light fuse and then switch on the lights to see if they are back feeding from something else. Try unplugging the tail lamp harness in the rear, Look at the front light harness to see if it is pinched between a fender or support bolt. Has the front sheet metal ever been removed due to accident? You could remove the light switch and see if the wires are getting hot with the lights on.
I believe running light wiring should be brown on these trucks. The rear cargo lamp switch is on that circuit also I believe.

10-12-2015, 02:55 PM	#13
Cape Codder Registered User Join Date: May 2013 Location: Centerville,Ma. Posts: 1,223	Re: Help- both turn signal indicators turn on when lights are on The first place to look for wiring issues is any place someone has fooled with the factory harness. The next thing to do would be to try disconnecting circuits till the lights go out. Have you pulled the running light fuse and then switch on the lights to see if they are back feeding from something else. Try unplugging the tail lamp harness in the rear, Look at the front light harness to see if it is pinched between a fender or support bolt. Has the front sheet metal ever been removed due to accident? You could remove the light switch and see if the wires are getting hot with the lights on. I believe running light wiring should be brown on these trucks. The rear cargo lamp switch is on that circuit also I believe.