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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

       
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Old 03-08-2007, 08:25 PM   #1 (permalink)
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Strange Electrical Problem

I am having a weird electrical problem, since I bought my truck the turn signals havent worked. The front signals work just fine but both the rears blink like the hazards are on when I signal left or right the blinking even stops like hazard flashers do when the brake is applied. Only thing I can think of is when the previous owner installed a trailer hookup he messed something up. Any advice would be appreciated.

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Old 03-08-2007, 09:06 PM   #2 (permalink)
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Re: Strange Electrical Problem

If there is a trailer pluggin that would be the first place to look. The bulbs could be a problem too since it is only the rears....

http://67.18.170.154/home/wiring.asp
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Old 03-08-2007, 09:59 PM   #3 (permalink)
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Re: Strange Electrical Problem

I had the exact same thing with my truck. It turns out in the back the previous owner had for some reason connected the left and right turn signal / brake wires together.

My theory is one brake light wasn't working, so they connected the 2 together. The turn signals and brakes use the same wire and bulb element.
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