Tail Lights not Working - Fiberglass RV


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Old 07-22-2013, 05:45 PM   #1
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Trailer: 1974 Trillium 13 ft
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Tail Lights not Working

Need some help folks. Trillium trailer '74. Hooked it up and no tail lights working. Checked fuses both on the trailer and the tow vehicle,connections and wiring as well. All wiring was replaced by Escape trailers 2 years ago. Worked awesome. Now nothing. HELP...
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Old 07-22-2013, 05:59 PM   #2
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First off what's not working the tail lights and running lights, or brake lights?
Second what's the tow vehicle?

Determine what not working then look at the fuses in the tow vehicle, power for the brake light and tail/running lights come from the tow. In my case I have relays along with fuses between the power and the trailer. So look for both.

Now it's time for the experts to tell you all about it.
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Old 07-22-2013, 06:47 PM   #3
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If you have no lights back there, check the ground. Check continuity between the trailer plug and the frame. Likely a broken connection or corrosion.
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Old 07-22-2013, 08:24 PM   #4
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Quote:
Originally Posted by The Minimalist View Post
If you have no lights back there, check the ground. Check continuity between the trailer plug and the frame. Likely a broken connection or corrosion.

Ah yessss, The head of the myth list.
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Old 07-22-2013, 10:08 PM   #5
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Did trilliums actually use the frame for ground? I know nothing about them.

I always tell people to cut a system in half when troubleshooting. In this case, at the trailer/vehicle connection. Get a meter or one of those plug in trailer light testers, and check the vehicle side first. If that's all good, I would run a meter from the ground at the trailer plug, back to the socket for the bulb and check continuity. Repeat for hot side. Then just narrow it down into smaller sections, whichever one is bad.
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Old 07-23-2013, 03:27 AM   #6
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Trailer: 1974 Trillium 13 ft
British Columbia
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Thanks for the help folks......tow vehicle (Kia Sorento '06) checked out fine with the help of a meter. All leads before and after fuses check out good.Plug lites up fine.
No lights (all fuses good) at all at the trailer though. (brakes, running, turn....nada)
I've sanded and cleaned all ground and connections on the frame. See how it works tomorrow after I put things back. Will let you guys know. Again...many thanks.
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Old 07-23-2013, 07:29 AM   #7
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If its good to the plug, and no lights work, it's a trailer ground problem as you've discovered.

Does the harness ground the frame, and the lights off the frame, or are the lights wired direct to the ground wire?

If it goes to the frame, it's between the plug and the frame. If not, it's between the plug and the first light. Welcome to trailer wiring. If there are any scotch locks in the wiring, rip them out now and replace them with proper crimps and adhesive heat shrink before its too late and you have to replace the wiring.
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Old 07-25-2013, 02:29 AM   #8
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YAY......lights on and all is well in the trailer world.........GROUND on the trailer WAS the issue. Had 3 of them. All cleaned up and working....many thanks to Jared J, Byron and the Minimalist for all the help..........this site ROCKS...YAH !!!!!!
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Old 07-25-2013, 08:11 AM   #9
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Anytime........glad we could help.
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