Added lights to rear carrier on Avalanche.

[Gus]

Have a 2013 Avalanche 5th wheel, purchased a small golf cart, rear carrier to carry cart but blocks one tail light. Added lights ( running, stop, turn) LED but
Can not get to work.
Found bundle of wires under back right, had correct color match but nothing.
The lights on trailer work but not add on two.

[66joej]

Do you have a good positive ground? Like wire to the trailer frame.

[JRTJH]

On many trailers the color of the wire can change between the front connector and the rear connection. On my trailer the wires going to the tail light/turn signals are not the same color as they are on the umbilical connector. So, you might have a similar situation.

You indicated that you're using LED lights. Most LED's are "polarity sensitive" meaning the + must be connected to POS and the - must be connected to the NEG or the lights won't work. You may get them to function by reversing the connections ???? Then again, maybe not, but worth a try. Let us know what you find.....

[Gus]

Ran a wire from truck battery ground to wires in back and checked with test light, nothing. Have I got the wrong wires?

[JRTJH]

Here's the truck/trailer schematic:

[Pull Toy]

Try battery + and battery - jumpers straight to the fixtures just to prove lights themselves. Ground shouldn't normally be a problem because you're probably "frame grounded", based on your set-up, but some aftermarket fixtures require a separate ground wire, because of the possibility of fiberglass mounting points. By running 12v power straight to lights with independent 12v +/- leads, you prove the light fixtures themselves. If the lights work, the problem is trailer wiring, if not the problem is the lights themselves.

You can double check your leads with a multi-meter, or test probe with a known good bulb to prove 12 volts to the trailer bulbs.

Good Luck,

[Gus]

Thank all of you for your suggestions.
We have 8 inches of snow here in Michigan, and cold.
We are leaving for Texas first of year, will work on it down there.
Thanks again,
Gus