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.