Troubleshooting No Power to Wire Harness for Trailer Brakes  

Question:

Expert Reply:

There are a few things you will need to do under the hood of your 2004 Chevy Silverado before you will have power at the wiring harness.

You will need to remove the bracket in the corner closest to the driver (see pic step A on the link below that I attached). Next, you will need to remove the top cover of the Accessory Fuse Block. Next, remove the lower cover to the fuses.

Next, you will want to locate the blue and red wires that are normally located next to the fuse block on the cab side. The blue wire has a plug on it, the red wire has a ring terminal on it.

After locating the blue and red wires, place the red wire over the closest positive post. A 30 amp fuse is needed in the location nearest the positive post to power the brake controller.

You will need a Double-Bonded wire, part # 10-2-1, which is actually 2 wires in one, at this point. Connect the white wire in the gray housing to the blue wire under the hood with a Zinc Plated Hex Flange Nut - M8, part # 185917. Connect the black wire to the auxiliary positive post. A 40 amp fuse will need to be placed in the last spot on the fuse box, closest to the post, to power the hot lead (see picture on the link below, step F.)

Once these connections are made, you will need to run the double bonded wire to the back of the vehicle, where it will be attached to the 6 or 7 way adapter. Once ran, connect the white (brake) and black (hot) to the blue (brake) and black (hot) respectively on the back of the 6 or 7-way adapter.

expert reply by: Jameson C

0