TT electrical hook up, Suburban

The only thing I would recommend is to go a step further and add a relay inline with the 12V power to the TT, and have it controlled by the ignition. I forgot to disconnect my TT electric from the burb for a few hours once, and came out to a dead truck :(

GL!

Thanks much BenK.

The 94 is quite a bit different than the 96 as my fuse box is at the bottom of the dash left of the steering wheel.

I did find the red and blue wires all wrapped up under the brake booster and the red one does have a terminal on it. They are really long, which is great.

Thought I'd run the red wire over to the battery for a direct hookup, then tap the hot wire(black?)from the Prodigy into said red wire. The Prodigy wiring diagram shows a direct hookup to the battery.

The blue will go thru the firewall direct to the Prodigy. Now just have to locate the white wire on the brake switch. Of course hook up the ground, I think I'll take it all the way to the battery also.

Was RV.net down yesterday? Couldn't get on til this morning.

From my post above. Mine is a 1996, but am told that yours and mine are the
same basics or platform

Mine is a K3500 Suburban, so has hydroboost...vs your half ton with
a vacuum boosster, which is most likely going to harder to get at that
OEM stub

1996 Suburban tow harness



after cutting open this stub that was taped and bolted to a metal
bracket. Note that the 'red' (orange) is still looped back on itself
after cutting away the OEM tap job...it took a bit more cutting to
free itself from that loop




A bit more of that stub opened up and is the end you are asking about. Notice
that the red (hot) line already has a ring lug


Red wire (really orange to me) ring lug on the fuse box stud



Blue brake wire and has no lug. It is to be wired to the P3 wires that is now
poking up...that I fished out through the hole/grommet the alarm guy made



The P3 wires connected to these wires and tied up





white ground wire and chose to use the same signal ground stud by the battery

I'm asking even though Chris and boogie indicated the wires might be under the brake booster cause mine's a 94 and theirs are newer.

I looked under there and there are several red and blue wires coming up from underneath.

So, finally got the Burb home and am trying to hook up the brake controller and install 7-pin connector.

I found these wires up under the hitch. The bundle of wires is labeled:

White - ground
Grn Dk - R. Turn
Yellow - L. Turn
Brown - RR Lamps
Grn Lt - B/U lights

I figure this harness must go all the way up to the front to under the dash or engine compartment and be already hooked up?

The red and blue wires are labeled:

Red - PWR Feed
Blue Dk - AUX

Hopefully these go all the way to the front but probably aren't hooked up because they would be, Blue for trailer brakes and red for power to the TT. Anyone know where they would come out in the front?

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.

Wow, thanks for all the info, wasn't expecting so much help.

As I had to do everything from replacing the engine and transmission in the '65 Chevy Van, and wiring everything including the brake controller with no pre-run wires, I do have a lot of experience doing this. Don't need to pay $67 for the Tekonsha harness.

I was hoping for and thankfully got some pictures of where some of these wires and connections are located on the Burb so I didn't have to spend a lot of time chasing them down.

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

In the wire loom 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 loom 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.

This should cover yours, even though a few years older than mine

1996 Suburban tow harness

If you are not well versed with making your own harness...buy it from Tekonsha...will
save you lots of time