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Old October 13th, 2009, 09:51 PM   #1
zac_369
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Default brake/tail/turn signals out

Just got a 1990 k5 and found out on the drive home I have no lights in the rear (turn signals, brake, tail, or back up). Checked the bulbs and all is ok. Tested the sockets and they are not getting any power.

I did hook it up to a trailer and got the passenger side turn signal and brakes to work on the trailer. So I'm pretty sure it has to be a short or something where the trailer wiring is wired into the truck.

I ran out of light, and motivation, so I'll be getting back to it in the morning. Any thoughts or tips on what could be wrong?
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Old October 13th, 2009, 09:51 PM   #2
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check the multi function switch
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Old October 13th, 2009, 10:52 PM   #3
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Quote:
Originally Posted by zac_369 View Post
I did hook it up to a trailer and got the passenger side turn signal and brakes to work on the trailer. So I'm pretty sure it has to be a short or something where the trailer wiring is wired into the truck.
You are close. Check the connections and test in that area. Odds are there is alot of corrosion in the harness by the plug.
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Old October 14th, 2009, 01:30 AM   #4
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You are close. Check the connections and test in that area. Odds are there is alot of corrosion in the harness by the plug.
the thing is the guy just had the hitch and wiring installed, so i dont think its corrosion
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Old October 14th, 2009, 08:13 AM   #5
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But, if you're getting some kind of action at the trailer the problem lies on the wiring around the plug. Something's wrong with the harness by the trailer connections. Test the wiring before and after. I've seen new stuff screw up especially if it was a scotch lock installation.
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Old October 14th, 2009, 04:26 PM   #6
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I guess the lights don't work when they are not conected... who knew? lol
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