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- - 1978 k20 wiring nightmare (https://67-72chevytrucks.com/vboard/showthread.php?t=703696)

Adamcalnan

04-10-2016 01:38 AM

1978 k20 wiring nightmare

I have a 1978 Chevy k20. The wiring on my truck has been a nightmare. Now I have replaced the 2 relays under the dash and searched for hours. When. I turn either sides turn signals on all of my lights blink on the outside of the truck minus my headlights, including my cab lights. Any help would be greatly appreciated!

nsstring

04-10-2016 07:32 AM

Re: 1978 k20 wiring nightmare

Start by pulling all the turn signal bulbs and see if one of them is a single contact bulb. If so it connects across the park/tail light and will make them all blink.

hatzie

04-10-2016 11:18 AM

Re: 1978 k20 wiring nightmare

Grounds... Look at the radiator support grounds first.
Just because the black wire jacket looks good doesn't mean there's still copper inside the jacket...

Pontiac1976

04-10-2016 11:42 AM

Re: 1978 k20 wiring nightmare

Quote:

Grounds... Look at the radiator support grounds first.
Just because the black wire jacket looks good doesn't mean there's still copper inside the jacket...
__________________

"GROUNDS" Very true. Bad grounds will do all kind a stuff. They have you casing all kind a stuff. All start with the easy stuff go throw A-Z

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