Question Was Asked By - bob

Brake controller wiring for 2005 Chevy Trailblazer

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Brake Controller Installation: Starting from Scratch

Question:

I am seeking assistance with electric brake controller connection for a 2005 chevy trailblazer ext. The owners manual indicates the wires are under the drivers side dash, but there is no connection block as described for part 20264.Thank you for your assistance.

asked by: bob

Expert Reply:

The part you were looking at, # 20264, will not work with your 2005 Chevy Trailblazer EXT.

If you have the factory 7-way towing wiring, the wires will be taped up under the dash to some other wiring with either a piece of white or blue tape. There will not be a connector on these wires and they will need to be spliced to the brake controller wires. A circuit tester, part # 3808, will be needed to be sure the proper connections have been made and the vehicle wiring is functional.

If your vehicle does not have the factory 7-way you will need to wire the brake controller to your vehicle from scratch using kit # ETBC7.

I am assuming that since your vehicle came factory with a hitch, you already have a 4-way connection for a trailer. If for some reason there is not a 4-way connector by your hitch or spare, here is the kit you would need for that, # 119176KIT.

I have added a link that may be helpful to you. At the top of the page it shows how to install a brake controller if the vehicle has a factory 7-Way plug installed.

The rest of the page gives instructions on how to wire a brake controller into a vehicle that does not have a factory 7 way. There are many links at the bottom of the page with videos of how to do various installs, even installs from scratch.

expert reply by: Patrick B

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