need help wiring issue

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Dec 9, 2014 | 08:17 PM

Raymond Tomlinson

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From: ravenswood

need help wiring issue

Have a 79 f150 and when the brakes are in use the front driver side turn signal comes on as a brake light can anyone help me please its kicking my butt trying to find out why all other lights work right but that on

Dec 9, 2014 | 08:42 PM

77&79F250

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From: S/W Missouri, Polk county

Wow that is a new one....something is crossed up in your brake and turning signal wiring for sure. Maybe these will help?

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Dec 9, 2014 | 08:52 PM

HIO Silver

Fleet Owner

Joined: Dec 2009

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From: NorCal

Have you reviewed the wiring diagram... lately?

http://www.fordification.net/tech/im...aster_5of9.jpg

Tell us what those two circuits have in common. Meaning, the front parking lights are receiving a voltage when they are not supposed to.

Drum roll please.....

Dec 10, 2014 | 01:19 AM

Raymond Tomlinson

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From: ravenswood

wiring issues

I have the factory wiring digrams from ford and its not helping me any I have so many wires that have been cut found two wires that are not in the digram that are cut in half I am lost this is what I am good at about to say the hell with it and rewire the whole truck justed because of that one light the light has to be crossed or shorting out or tied in to the brake switch

Dec 10, 2014 | 05:04 AM

77&79F250

Moderator & parts slinger

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From: S/W Missouri, Polk county

So wires have been cut, ok no problem find the ones that have been sliced back together wrong. Meaning just go look for just that splice, by the PO probably.

Dec 10, 2014 | 07:53 AM

dlburch

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From: Kansas

Check the simple things first. Confirm the rear bulbs are good and correct for the application. Second check the condition of the sockets (no corrosion). Next check the resistance from the sockets to ground. Does the front light still come on if you try it with both rear bulbs removed? If so you prob have a wiring or turn signal switch problem

Dec 10, 2014 | 08:14 AM

HIO Silver

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Joined: Dec 2009

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From: NorCal

Quote:

Originally Posted by Raymond Tomlinson

Well Raymond, that would have been important information to include in your original post. Then we may not have bombarded this thread with wiring diagrams.