There are separate fuses for trailer signal lights in main fuse panel
Hitch the trailer. Connect the lights. Start your car or truck. Turn the turn signal on. Get out and go behind the trailer. See if they blink. Repeat for the other side.
This year of truck has a separate circuit for the trailer turn/barke/tail lights. Look under the hood, under the fuse box. Look for the trailer fuses on the fuse directory
You'll need a truck that's heavy enough to pull the trailer, equipped with a trailer ball hitch to attach the trailer. You also need to make sure the horse trailer has operating turn signal and brake lights.
I would check the running lights for one with a short. I had the same sort of thing with my trailer and I spent way to much time troubleshooting the brake and signal wires. Turns out a running light bulb connector was grounding out on the trailer and messing it all up.
If the Avalanche came with the factory trailering package, the trailer lights are separately fused from the other truck lights. Check your fuse panel layout for a 10-amp fuse for left side and a separate fuse for right side turn signal/brake light on the trailer.
They are lights that go on your trailer to show your turn signal and brake lights. Reese Hitches has all of the top brands if you're in the market for some: http://www.reesehitches.com/product_categories/trailer_lights
Check ground circuit Check bulbs they are duble filamented one may be burned out Seems to me there is a wire crossed at the harness. I think the vehicle left turn signal wire is hooked up to the trailer tail lights wire. Usually there are four wires at the trailer harness, yellow, green, white, and brown, The brown wire is usually the tail lights and side marker lights, the white wire is ground, the yellow and green go to the left and right signal lights.
There are the wires that control the lights on the truck. And there are the wires that go to the trailer tow package. Left turn & stop on the tow pack wires - yellow Right turn & stop on the tow pack wires - green Left turn & stop for vehicle lights - green with a orange stripe Right turn & stop for vehicle lights - orange with a blue stripe There is a secondary fuse panel under the hood that controls the tow pack wires only.
Turn signal indicators are lights. The flash to tell you, or indicate, that a turn signal is on, and which way the lights are flashing.
POSSIBLY A BADGROUND
Yes, it's possible to turn a truck bed into a trailer, known as "truck bed trailers." With some modifications, like adding wheels, a hitch, and lights, you can convert the truck bed to tow cargo. However, ensure it complies with local regulations and safety standards for road use. Contact Us : 325-500-8970
frist remove turn signal/marker lights then remove grill from rad support.