- 1). Mount the bracket for the brake controller on the lower portion of the dashboard using the drill and self-tapping screws. Slide the brake controller into the bracket. Crawl under the dash and locate the junction box on the firewall, which is a black plastic box with a plastic nut holding on the cover. Remove the plastic nut by hand and take off the cover.
- 2). Run the wiring from the brake controller to the junction box, leaving it loose for now. Plug the harness into the second harness from the left in the junction box.
- 3). Tuck the wiring for the brake controller underneath the dashboard, and secure it to other wiring using the zip ties. Reinstall the junction box cover using the factory plastic nut.
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