99 Suburban pre-wired for brake controller?

[RankAm]

My 1999 Suburban came from the factory with the "towing package," and now I need to wire it for a brake controller. Does anyone know if it should be pre-wired with a connector plug for a brake controller? If it is pre-wired, what (and where under the dash) should I look for in terms of wires and connectors?

Thanks, Hank

[HowieE]

Not sure the 99s came prewired. My 97 had the wiring in the harness but did not have the receptacle at the rear bumper or a connection forward.

Take a look under the hood just below the steering column for 4 wires folded back on themselves and taped. Also look inside the drivers side rear frame member. There should be a hole on the inside of the frame about 15 ins. from the end of the frame. The wires will be inside that hole folded back inside.

[RankAm]

HowieE, thanks for the information. I have found the wires at the rear of the vehicle, and I will see what I can find up front. Hank

[kennethowens]

You will want to buy the adapter that
will connect the brake controller to your
TV. Two small screws to mount. If prewired
correctly, you should have a 7-pin outlet by
your bumber. A notepad and a simple test light
will be useful when testing and taking notes
at the bumper.

A couple of schematics printed would be useful. They
can be found and printed here in the forum.

<From TV> and <into trailer> TWO PARTS

Left blinker
Right blinker
Running lights
Brake lights
Backup lights
Power for brakes
Power for battery charging from TV to trailer

[LJH]

I think 2000 and later Subs came prewired from the factory. LJH