Another trailer light question

[WM75Guy]

There is a break in continuity somewhere on the brown wire. Are you using a 4 wire or 7 wire plug? If possible did you take the trailer plug apart and check for corrosion where the brown wire is connected or just clean the pins?

 

[Yander]

So power on the brown wire isn't reaching the lights.

Thanks yeah, I see now the brown wire runs the running lights. I need to figure out where that is open.

Thanks

 

[Yander]

There is a break in continuity somewhere on the brown wire. Are you using a 4 wire or 7 wire plug? If possible did you take the trailer plug apart and check for corrosion where the brown wire is connected or just clean the pins?

7 wire. I just cleaned the pens with a small screw driver and pen oil.

Let me check that plug to see if I can take it apart. Since it is both lights it feels like it could be the plug.

 

[Fallon]

LEDs care about polarity, but standard filliment bulbs don't. You may have them hooked up backwards.

 

[RayIN]

Spray contact cleaner is your friend when facing a power problem.
Also, is the trailer ground in the 7-way plug or through trailer ball? That is the other half of a 12V circuit.

 

[Yander]

Well, it was a very simple fix. Kind of embarrassed to say what it was. When I swapped out the trailer lights for LEDs, there were two brown wires on one light that came from the trailer. One brown and one Brown with black stripe. I chose the one without a stripe to wire the light to, thinking that it should only need one brown wire per light. I capped the brown/stripe wire, not thinking that it was feeding both lights, but it was. I thought it might have been the wire that lights the license plate, and I wasn't concerned about that.

I went back and wired both brown wires from the trailer to the light, and everything is now working.

I don't work on trailer lights often enough to get good at it, or even remember what I did to fix it last time. I watched a really good YouTube video that I learned a lot from.