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Old April 2nd, 2010, 01:14 PM   #1
hillbillyUNSK
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Default !978 Ford F-150 wiring problems Need Help

I have a 1978 Ford picup that the previous owner Put a flat bed on and completely messed up the wiring back there I rewired it but I am still having problems with the turn signals when I turn them on in the front there fine but the back they flash like hazards what could be the problem?
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Old April 3rd, 2010, 01:25 AM   #2
Yota Bill
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I just rewired all of the lights on a 76 F250 last weekend...you should have a yellow/black wire (left rear) and a green wire (right rear) running from the turn signal switch to the lights...there you should have a dual filimant bulb, which is the running light and the brake/turn signal...the brake switch feeds positive curret to the turn signal switch through a red/black wire, so the brake light signal goes through the turn signal switch, which allows the turn signals to interupt the brake light signal when in use...the front turn signals are on there own seperate feeds off of the turn signal switch (green/white to left front and left dash indicator, white/blue to right fromt and dash indicator)

as far as the rear goes, its basically the same as a trailer...even uses the same color code (yellow = left, green = right, brown = running) I would also suggest running a dedicated ground wire to each light (stock, they just connect to teh bed with a self tapping screw)

somehow you managed to connect both togethor, or have both connected to only 1 output from the turn signal switch...or you have the grounds tied in series...make sure each has its own seperate ground.
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Old April 4th, 2010, 06:48 PM   #3
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Thanks Yota Bill When I get back out there to work on it again i will use this
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