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Trying to hook up aftermarket trailer brake controller
My local Jeep dealer tells me that all four wires should be in place somewhere under the dash. I have found the blue "brake" wire, but cannot find any other loose wires or anything that looks like an available plug in for the brake controller. Someone suggested I will have to manually run the other three wires for the controller. My owner's manual says I have a factory installed hitch with factory installed trailer wiring. Any help?
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Didn't it come with a wiring diagram? If you don't have a wiring diagram for your vehicle, don't do this yourself. You can really screw up things under the dash if you don't know what you're doing.
Color for each pin in the plug is stamped along side of each pin. This will get you hooked up. I can tell you that green wire is right turn and brake light, yellow is left turn and brake light, brown is running lights and marker lights, white is ground-frame to frame. This 4 wire plug colors and same on a 7 pin plug. It's universal standard. The other wires are for trailer battery charging from vehicle, emergency braking for dis-connect, and to the control box under dash.
First thing is your van equipped with a trailer brake controller and is it working. This is usually a small box that is installed inside the vehicle and is needed to operate the brakes. Next what type of plug do you have on the vehicle to plug the trailer into some plugs do not support wiring for trailer brakes. If you have a aftermarket trailer brake controller it will not be fused in the fuse panel so you will to locate a inline fuse used to power up the controller. Hope this helps.
You have a bad ground wire problem somewhere. The hot wire to the brake lights is back feeding into the other wires. My be in the taillights. I have seen people install a trailer light hook up plug and wire it wrong also that will make this happen. Good luck!
Sometime around 2000, GM started putting trailering pre-wire harnesses in the vehicle. Your truck may have this harness built in and would greatly simplify brake controller installation. Look under the glovebox and see if there is a wire harness tied off. There will be four wires in this harness, which should be run over to the steering column to use it. Most trailer brake controllers are compatible with this harness.
The four wires in the harness are: Red, 12vdc; black, ground; blue or purple, brake pedal; and brown or white, trailer brake wire to seven pin, four pin, or five pin connector at trailer hitch, if your truck came from the factory with a trailer hitch.
If you are adding the hitch and do not have the four wire harness, the under hood wires from your brake controller are Red, connect to one of the studs under the distribution box cover (the distribution box is on the driver's side against the firewall. Underneath the cover are two large threaded studs which are hot from the battery all the time); and the other wire from your brake controller would have to be run the length of the truck along the frame, tied off in several places, to the trailer hitch connector on the bumper. Follow the directions that came with trailer hitch wiring connector to connect this wire to the proper pin in the connector.
If this has helped you, great, and please remember to vote/comment.
Good luck!
a brake controller has 4 wires on it, Black, white, blue,red.
Black is positive battery 12 volts connect to 30 amp circuit breaker to the battery
White goes to good solid ground
red connects to white wire from the brake switch
blue wire connects to 7 way trailer connector at rear of truck. If the truck has trailer package you will find the blue wire and red wires under brake booster taped to the harness you can connect your blue brake control wire to that blue wire. At the rear of the truck the other end of the blue wire will be taped to a harness under the rear of the truck. you will have to now connect the blue wire to the blue input on your 7 way connector
You likely need diode isolators on the turn signal wiring on the trailer, or on vehicle side connector. Your local auto parts store should have what you need, and show you how to install them.
what are you asking? how do you get the lights to hook up to the back of your truck? you may need a pigtail connector to hook the trailer up and have it work properly.
Their should be a 6 pin conector that only 4 pins are used somtimes a 5th wire is installed for illumination, don't worrie about using that one. The connector is located in one or two different spots, the most popular place is under the dash on the drivers side just below the steering column the connector is grey. The colors are black or red / blue / green / white and sometimes a small black or brown wire is for illumination, don't worrie about that wire. Their are wiring harnasses for sell to hook the brake control through the conector, but if you do not want to buy an adapter hook the wires as followed: VehicleBrake Control
Black or Red Black
Blue Blue
Green Red
White White
Black is power in to the brake control
Blue is the trailer brake feed
Green is brake signal
White is Ground for the brake control
The connector is located under the dash on the left side of the steering column. Their is a box, remove the cover and starting from the top left the second connector location moving to the right is the one to hook into, make sure that you have the correct wiring harnass adapter for the vehicle, their are two different ones for GM trucks. On the inside of the cover is also a diagram of the lay out of the box.
Wires should be inside one of the panels on the sides in the rear?
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