Turning lights/taillights

[estoguy]

I’ve lost half my running lights and both taillights. Checked grounds as well as replaced trailer plug. Did notice voltage drop from front lights to the half not working. Any ideas? Do these led lights have an led driver?

[rohrmann]

I would check the connections in the box that the trailer cord connects to, might have a loose connection or corrosion. There no driver, the lights are connected just like conventional light bulbs.

[Daryles]

Hope this diagram helps.
There is a wiring junction behind the left tail light that feeds to the right tail light.

[estoguy]

Thank, guys. Checked all that. I have a suspicion that there is some sort of break or short in the ground wire running from the junction box under the king pin to the first marker light on the left side of the trailer..

[Lee-CI]

Originally Posted by estoguy

Thank, guys. Checked all that. I have a suspicion that there is some sort of break or short in the ground wire running from the junction box under the king pin to the first marker light on the left side of the trailer..

When I have such suspicions, I often disconnect the suspect wiring from both ends and take another length of wire to make a full length jumper test wire. You don't even have to cut your spool of wire. Simply strip both ends of the spool and leave the unused portion on the spool. Let us know how you come out.

[wed]

It’s probably in the shore cord

[Foldbak]

Don't know what year trailer you have but if it has a Giggy box I'd start there.

[mellosmann@hotmail.com]

Originally Posted by Daryles

Hope this diagram helps.
There is a wiring junction behind the left tail light that feeds to the right tail light.

Thank you, this will help give me a start.