Where's the 2026 Trailer Brake Control Plug?

[KevinH-TX]

I have a "26 with basic tow package and am also looking to install a Redarc TBC. There are no wires or connector in the bundles under the dash. The missing connector used to include 4 wires:
1 - 12V constant
2 - ground
3 - brake signal
4 - brake control (the blue wire)
On my 7pin socket the Blue trailer brake controller wire terminates at the next connection going forward, so it isn't even run to the cabin. It looks like the brake signal wire up front is only installed if you get the advanced tow package. Power and ground are easy to run. The problem I've read about is that the brake signal needs to come from somewhere besides the brake pedal for reasons I'm not clear on. Supposedly, there can be feedback from the redarc signal that can get back to and maybe cause damage to modules in this computer we are calling a truck. There are two places most often cited for getting the signal if you don't use the wire at the brake pedal; one is the third brake light over the back of the cab and the other is the signal going to the 7pin socket. Even when using these sources it's recommended to install a filter. Redarc makes a special harness for this issue that includes a diode to filter out back feed. It runs two wires from the 7pin socket to the cab, a red brake signal to TBC and a blue return to control the trailer brake from the TBC and includes the diode filter. The part # is TPWKit012. The problem is that Redarc doesn't sell it in the states. So my question is to Scotty B and others that have had a shop run wires, How did the shop wire the brake signal, and have you had any issues? Is feedback an issue? Redarc thought so and built a harness that is exclusively meant for the Australian Ranger. I talked to their support group and they verified it's an issue in Australia but couldn't say it's an issue in the states. I can get nothing from my dealer. To be safe I'm thinking of having an Aussie order the harness and then ship it to me but would like to hear about what others have done.

Vic, which RedArc TBC are you referring to, with respect to the potential feedback issue? I was just about to order the wireless "Link" model from them...... but this feedback about feedback has me "putting on the brakes" on the purchase.

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[VicL]

Vic, which RedArc TBC are you referring to, with respect to the potential feedback issue? I was just about to order the wireless "Link" model from them...... but this feedback about feedback has me "putting on the brakes" on the purchase.

Kevin, call me old fashion but I'm trying to go with the wired Redarc Liberty TBC. I don't know much about the wireless controller. Could be a no brainer and I may go that way IF the wired solution fails, but I have qualms with depending on a wireless connection. Is it blue tooth with an app or is it a dedicated radio sender/receiver?

 

[Scotty B.]

Hi Scotty B,
Re the redarc TBC you had a shop install, do you know where they ran your brake signal wire from?

It wasn't a Redarc, it was a Curt Triflex. But they ran a wire back to the 7 pin connector near the rear bumper. And FYI...The controller works great.

 

[Scotty B.]

I have a "26 with basic tow package and am also looking to install a Redarc TBC. There are no wires or connector in the bundles under the dash. The missing connector used to include 4 wires:
1 - 12V constant
2 - ground
3 - brake signal
4 - brake control (the blue wire)
On my 7pin socket the Blue trailer brake controller wire terminates at the next connection going forward, so it isn't even run to the cabin. It looks like the brake signal wire up front is only installed if you get the advanced tow package. Power and ground are easy to run. The problem I've read about is that the brake signal needs to come from somewhere besides the brake pedal for reasons I'm not clear on. Supposedly, there can be feedback from the redarc signal that can get back to and maybe cause damage to modules in this computer we are calling a truck. There are two places most often cited for getting the signal if you don't use the wire at the brake pedal; one is the third brake light over the back of the cab and the other is the signal going to the 7pin socket. Even when using these sources it's recommended to install a filter. Redarc makes a special harness for this issue that includes a diode to filter out back feed. It runs two wires from the 7pin socket to the cab, a red brake signal to TBC and a blue return to control the trailer brake from the TBC and includes the diode filter. The part # is TPWKit012. The problem is that Redarc doesn't sell it in the states. So my question is to Scotty B and others that have had a shop run wires, How did the shop wire the brake signal, and have you had any issues? Is feedback an issue? Redarc thought so and built a harness that is exclusively meant for the Australian Ranger. I talked to their support group and they verified it's an issue in Australia but couldn't say it's an issue in the states. I can get nothing from my dealer. To be safe I'm thinking of having an Aussie order the harness and then ship it to me but would like to hear about what others have done.

Here's a picture of the fuse panel under the knee bolster. Notice what the yellow arrow is pointing at (not the connector by my finger). I think they said it was double fused on one terminal (maybe a 5amp and a 10amp?} I hope this helps.

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