Trailer marker light issue

Double check the plugs, wire could of came out of the screw and just touch, if not I would start checking grounds/wires on the back

 

really all depends on how the trailer is wired or however Jim bob rewired it with electrical tape to get the lights working after a similar problem

usually go back to the last thing you touched when you have a problem after changing something

 

We need a little Clarity here. Just to make sure we're getting on the same page, you have two trailer cords? And where exactly did you switch the wires? And the last thing, are those mid-turns coming on like they have full power, and do they work normally when you turn the turn signal on?

 

Usually with LED lights, any back seat issues are related to ground problems.

I would start by unplugging the axillary cord, and seeing if you still have issues. If the problem is still showing up, unplug the main board and get a test flight for a voltmeter and verify that you're not getting any voltage into the turn signal circuit.

If the main board checks out okay, I would plug it back in, and see what kind of voltage I'm getting at the mid turn lights oh, and whether it's on the hot wire or the ground.

 

Switch your wires back to the way they initially were and see if that fixes your issues. Your ABS just needs a hot wire.

 

Isn't the blue wire the abs wire, while the green and yellow are the turn signals?

 

Yes, but it sound like he has 2 trailer cords, one green one yellow. At least that's how I read it, it's kind of why I asked for clarification that really didn't get