Where to Install 12V Power Fuse for Brake Controller on 2004 Chevrolet Avalanche

Updated 08/23/2013 | Published 08/20/2013

Question:

my brake controller has no 12 volts to it.where do i find the fuse?

asked by: Jim

Expert Reply:

If your 2004 Chevrolet Avalanche did not come with a factory tow package there will be two wiring connections that will need to be made in the engine compartment in the Accessory Fuse Block.
You may need to install a 40-amp fuse in the location nearest the positive post to power the trailer 12V circuit and a 30-amp fuse to provide brake controller power.

The linked article describes the process for connecting the brake controller 12V power input and trailer power wires in the engine compartment. I have also included a photo that shows the fuse block and where to install the green 30-amp fuse and the orange 40-amp fuse.

If your Avalanche does not have a 7-way trailer connector you will find under the rear of the vehicle on the driver-side either a round plug or cut wires. If you have a round plug you can use part # 30955.
The round vehicle connector plugs into this 7-way.

expert reply by: Adam R