Four pins, five wires?

[csdivine]

I have been trying to determine if my trailer is wired incorrectly (which I doubt) or if my U-Haul installed hitch wiring power module has gone bad. The trailer lights aren't working correctly.

But while investigating, I noticed this:



Why would my trailer's factory-installed 4-pin connector have five wires running into it

-- Chris

[asianflava]

Two of the wires go to one pin. I think it is the wire that supplies power for the running lights. You want both sides on at the same time.

[rainjer]

Make sure you have a good ground on every light on th trailer side.

[Sierrajack]

Brown and brown with yellow stripe are connected together.
Yikes, looks like a nuclear melt down.

[Dale M.]

Brown and brown with yellow stripe are connected together.
Yikes, looks like a nuclear melt down.

Dont think its melt down, think its just wet...

Dale

[Miriam C.]

Possibly someone installed a new plug. That one looks a bit beat up so check your female side and see if the connectors are spread and not getting a good connection.