My wife bought me a APC Tailgate light bar with reverse for Christmas. I attempted to install it this past weekend.

I spliced into the reverse light wire from the tail light and then plug the connector into the 4 pin trailer harness.

Everything looked good and before I mounted it I wanted to test it. When i tested the light bar only the tail lights worked. The brake lights, turn signals, and reverse lights did not work. Any ideas? Thank you

 

I bought one a while back (without reverse) from a company named Bully. It was crap. It took less then a month for the solder to break and one of the bars to stop working. But i also had some similar problems, Seemed that only my brake lights, and turn signals worked, the parking lights didnt work. I even changed the trailer harness connector, thinking it could have been corrosion in the harness. Still a no go. I don't think I'll buy another one..

 

double check your connections. cheap guess something came loose between test and actual mounting.

 

I rechecked the connections multiple times and even checked the trailer harness with a Meter and everything looked fine

 

Sounds like the bar might be bad.

 

it the key on? does the normal reverse light come on when trying the led bar?

read the directions carefully, I installed mine and it didnt work, so I checked the direction and they use BLUE wire for ground instead of BLACK wire, how dumb is that?

 

Yes, I would check the wires again, or the ground.

Otherwise it sounds like the bar got screwed. I don't have one with reverse, mine is the solid red bar, and I only use the 4 prong trailer plug and it works great. Its been on the truck for 2 years, and I've never had a problem.

Although I didn't use the double sided tape feet, I just used stainless steel self tapping screws to attach it to the truck, that way if I need the spare I can just unscrew that, and theres the opening.

 

Quick way to check the bar, is to get a spare battery or use the trucks, and directly wire the ground on the bar to the neg terminal.
Then, pick a wire in the bar and flash it to the pos terminal on the battery. You will see either your turns/brake/running/reverse lights switch on/light up in the bar.
If everythings good, then the bar is OK.
Hope this helps?
Al.

 

Yes, the key was on and the normal reverse lights were turned on.

I will give that a try abarmby at least I can rule out whether it is the bar or not.

Thanks for all the replies

 

If I had to guess, you used a quick splice t-tap. Sometimes they can cause issue's if you use a 16-14ga tap for an 18ga wire and vice versus can cut the wires. You should have used a blue tap. Red ones are for smaller wires. Yellow is for larger wires.