TT electrical hook up, Suburban

boogie_4wheel wrote:
My '97 K1500 truck was pre-wired. I'd assume the burb to be the same.

In the wire loop on the driver's frame rail, cut/dig back a few inches from the end (near the bumper), and locate the red and blue wires. If they are installed, that is where they will be.

The other end of those wires are in the loop underneath the brake booster. It will take a little digging to get to them, then pull them out. If I remember correctly, there isn't quite enough wire for the red to reach the aux stud (oh wait, the pre-96 doesn't have this, does it?).

Add an inline fuse or circuit breaker on the red wire and attach to the pos battery terminal, after the wire is made up on the plug.
Connect the blue wire to the output from the brake controller.

There is not a pre-wired harness and plug for the brake controller. You will need to source a 12V source, ground, and the brake pedal signal.

I had a 95 Z71 with the tow package and it did have the wire under the brake booster and the aux stud was in the electrical box.
I think the 88-94 were the original build and electrical design, 1995 was the first year of air bags and the dash and electrical was all changed, it changed from driver's side only airbags in 95 to both front in 96 until the end of the production run in 1999. We bought one of the last 1999 Suburbans at a good price and basically the only difference to anything from the 95 was the dual air bags.