Need Trailor wiring

[DCVING 6]

I have a 99 Chevy Tahoe 4x4, 5.7L. It came from the factory with a hitch and has never been used. It has a 5 wire harness under it with no plug on the end. I assume it is for your normal flat 4 plug.

It also has a 8 wire connector in behind the bumper. I was told I needed a "Y" harness to go inbetween the factory connection and the other end would go to the trailor. I do plan on installing an electronic brake controller in the future.

Anyone know of a website I can find that would give me a picture of what I need. I would like an idea of what I should be looking for.

 

[ijames]

I'm pretty sure Northern Tool (northertool.com) carries all the various adaptors. Best bet is to go to a PepBoys or AutoZone type auto parts store and just browse the trailer parts aisle. I forget the brand Pep Boys sells but the packages all list the applications and have pictures of the wiring diagrams and you can see the connectors through the clear plastic container.

 

[turbofish38]

You have to wire in your own harness on that year. Here's a copy and paste from the FSM showing what wire is what.




The option UY7 trailer harness is for heavy-duty towing applications. A 30-amp fused battery feed wire and auxiliary circuit routes from the cowl-mounted junction block, along the body side rail, to the rear bumper crossmember. The harness for the brake/parking lamps is spliced from the rear lamp harness. The harness is at the rear bumper crossmember. A plastic strap binds the harness. Tape wrapped around the harness prevents short circuits.

The 8 wires have the following functions:

• Orange -- The 30-amp fused battery feed

• Blue -- An auxiliary circuit for electric trailer brakes

• Brown -- The taillamps and the license lamps

• Light green -- The backup lamps

• Dark green -- The right turn signal and the stoplamp

• Yellow -- The left turn signal and the stoplamp

• White (heavy gage) -- Ground

• White (light gage) -- The center high-mounted stop lamp

The UY7 option does not include a connector at the end of the harness. A qualified technician must wire the connector following production.

Attach the trailer harness wiring to the trailer
Strap the harness wiring to the vehicle in a manner that allows slack in order to prevent the following conditions:
- Bending

- Binding

- Breaking

- The harness drags on the ground.

Secure with tape or straps the trailer portion of the harness to the trailer tongue in order to prevent the harness from dragging on the ground.
Secure the harness when the harness is not in use.
Wrap the harness together.
Bind the harness with a tie strap in order to avoid damage.
Store the harness behind the rear bumper on the fuel tank.
Strap the harness with a band or a tie strap.
The second wiring harness option is the UY1 camper wiring harness. The UY1 harness is under the vehicle. The harness is inside the frame rail. The harness is even with the front of the pickup box on the driver's side.

The UY1 harness is for the brake/parking lamps. The harness has an auxiliary power feed.

The wires have the following functions:

• Dark blue -- A 30-amp fused auxiliary power circuit. The other end of the wire is taped to the wiring near the junction block on the cowl.

• Dark green -- The right turn signal and the stoplamp

• Light green -- The backup lamps

• Yellow -- The left turn signal and the stoplamp

• Brown -- The taillamps

• White -- Ground

Route the trailer harness wiring between the frame and the bumper, or the camper and the body, in such a manner that slack remains in the harness in order to prevent the following conditings:
- Bending

- Binding

- Breaking

- The harness drags on the ground.

Tape or strap the trailer portion of the harness (if used) to the vehicle in order to prevent the harness from dragging.
Secure the harness when the wiring is not in use.
Wrap the harness together.
Bind the harness with a tie strap in order to prevent damage.