Trailer wiring melted!

Trailer wiring melted!

Postby sfeaver [OP] » February 3rd 2010, 4:10am

Had a problem on the weekend where after moving the van for the first time in two weeks, the brake lights stayed on dimly. Well eventually I found the cause. Thought I would share it, would be a good idea to take a quick peak if you have a connector like this. On the new one I covered everything in dieletric grease so the water can't attack it again.

Had quite a smell too, although at first I just assumed it was the exhaust since it had been sitting so long. Well it wasnt!

That wire that is missing was complete eaten away from corrision. Thats the orange wire.

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Hope this might save someone some agrivation. The orange wire is fed from the front underhood fuse panel with a 30 amp fuse. Thats where the feed for keeping the lights came from. But if I hadnt found the cause I wonder what would have happened if it melted more!

Scott
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Re: Trailer wiring melted!

Postby astroturf » February 3rd 2010, 4:18am

Good find. I might have encapsulated the wires in a silicone though. Do you have a pic of the repair? Again Thanks for sharing. Jim
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Re: Trailer wiring melted!

Postby sfeaver [OP] » February 3rd 2010, 4:24am

Silicone is a good idea too, but not if I ever want to take it apart. The dielectric grease was gooped on real good :). I didnt take any pictures of the repair, but basically I just cut back the wires a couple of inches and recrimped on some eyelets. Then put on a new connector. Looks the same as the old but not cooked.

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Re: Trailer wiring melted!

Postby astro355 » February 3rd 2010, 4:28am

What kind of connectors did you use? Anything that is exposed to the elements should be soldered and shrink-wrapped. Butt-end connectors should never be used since there is no good way to seal them and they allow water/salt to get into them.
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Re: Trailer wiring melted!

Postby Mr_Bowtie » February 3rd 2010, 5:41am

Thanks for sharing! :clap:
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Re: Trailer wiring melted!

Postby tedanderson » February 3rd 2010, 2:36pm

Thanks for that info. I am going to check my trailer's harness. I have that connector on my Trailblazer and I made my own makeshift 7 pin to 4 pin connector. I slapped it together a couple of years ago to make a last-minute connection but I've never gone back to check it or do it the right way. And with all of the recent snow, salt, etc.. I'm sure that I might have some problems too.
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