Troubleshooting Right Side Turn Signal Not Working On Trailer
Updated 12/20/2024 | Published 05/14/2011
Question:
trailer brake lights work left turn signal works right signal dont work but hazzard lights on both sides work running lights work ok
asked by: Kent
Expert Reply:
This sounds like a ground problem on the right side. The turn signal not working makes sense because with the brake lights, there is a constant signal coming through which is enough to make the lights illuminate on both sides like they should. But the on/off of a turn signal does not offer enough consistent voltage and makes the problem apparent.
On the vehicle, check to see if there is a turn signal fuse for the tow package wiring that may have blown. You can use your owners manual to find the location and size fuses that are needed.
Next, check the grounds on the ride side where the problem is. Trailer lights usually ground through their mounting studs unless there is an obvious ground wire. In either case, the ground will need to be attached to a clean and corrosion free bare metal surface.
You can also make sure that the main ground from the trailer connector is also connected to a clean surface and that the connector itself is free of any dirt or corrosion. Make sure to check the vehicle side connector too. If you find any loose connections, broken or frayed wires, those will need to be repaired as well.
Cheaden R.
7/14/2020
My break and running lights work and my left blinker works, but my right blinker won’t turn on at all. We have already ran a new ground wire which made all of that possible before no lights were working. But now it’s just the right blinker that’s not working
Chris R.
7/18/2020
Shammah F.
7/19/2020
New to owning a trailer so positive input is much appreciated. My right trailer light on a 1977 21' went out, thinking it was a bad bulb I pulled it .. bulbs fine as I removed the back plate to asses the wiring it blinked back to life!! Thinking everything was ok and it was just a bad connection I re splice- connected the back wires and connected them as they were mangled and in a twist connector by the prior installer. Now my back light won't turn off and the bulb doesn't seem to dim enough for the blink to take affect ... my only thoughts are that me making the shit connection solid has direct wired the current ... how can I repair this ? Or can I? Any help is greatly appreciated.
Chris R.
7/24/2020
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Noland
4/7/2020
My issue is similar. All lights work on trailer. Marker, brake, left turn and right turn signal work. Except right turn will work when taillights are off. When they are on it wont work.. same with hazard. right works when markers are off but not on. the right arrow light on dash stays solid, not blinking. ground is solid and same issue with any stop turn tail I hook up.