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No Tail Lights

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Old Oct 30, 2007 | 02:23 PM
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No Tail Lights

I was recently made aware of the fact that I do not have tail lights on my '90 F150 4x4. The officer was nice about it though. Anyway I have the following um..problem, I have brake lights except when the head lights are turned on, rear turn signals will flash both sides but not at all when head lights are on. Front lights and turns work fine. Checked and replaced bulbs, traced wire as much as possible but nothing. I have not gone under the dash yet. I only have 8 days left on the fixit ticket, any ideas.

One more thing, the turn signals flash normal (inside and front) until the lights are turned on then they get very slow and stop at times. Also when turned on and the brake pedal is pressed as far as possible they do the same thing but if you let up a little on the pedal they flash (inside and front) normal.
 
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Old Oct 30, 2007 | 02:59 PM
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bad ground, bad bulbs, bad light switch, bad fuse, corrosion or loose wire.

i vote bad ground as the most likely.
 
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Old Oct 30, 2007 | 03:02 PM
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Originally Posted by quicklook2
bad ground, bad bulbs, corrosion or loose wire.
his answer is no fun and not easy to diagnose but there's too many possibilities and no great answer unfortunately. could be all of those...start checking
 
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Old Oct 30, 2007 | 03:05 PM
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i wonder what do you mean by my 'answer is no fun'?
 
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Old Oct 30, 2007 | 03:07 PM
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Originally Posted by quicklook2
i wonder what do you mean by my 'answer is no fun'?
no fun as in it's no "o, thats common, just plug in your XYZ"

no fun as in "it could be anything, check and double check everywere for any little thing"

its just frustrating (no fun) to hear that it could be any number of things wrong that are hard to track down
 
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Old Oct 30, 2007 | 03:15 PM
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I new that it could be any number of things. I have never had all of the issues at once though. I was just hoping for a quick fix but I knew that was not going to happen. Looks like it is gonna be a long night, cold too.
 
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Old Oct 30, 2007 | 03:26 PM
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Originally Posted by truckhound
I new that it could be any number of things. I have never had all of the issues at once though. I was just hoping for a quick fix but I knew that was not going to happen. Looks like it is gonna be a long night, cold too.
I would bet on no ground at the tail sockets.
 
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Old Oct 30, 2007 | 03:43 PM
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that is what i think also.

i would start there with a jumper wire connected to a good ground.
 
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Old Oct 30, 2007 | 08:59 PM
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The sockets where the balb itself goes in will corode it did it on my truck i had some of the same problems you listed i used steel wool to cleen them up and a little contact cleaner and that worked pretty good.
 
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Old Oct 31, 2007 | 07:19 AM
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Thanks for all the replies. I think I found the problem. There is a connection where the trailer wiring harness connects. These where taped and looked good. I took them apart, wires where slightly green. I cleaned and retaped them. Everything seems to work fine. It never occured to me that even though the connections where still tight, no loose wires, that they could still be bad. I plan on getting some actual connectors and permanently fixing it.

Again thanks for all the help.
 
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Old Oct 31, 2007 | 09:44 AM
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glad you found it.

a little corrosion ccauses a lot of problems.
 
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