A how to: Brake controller install in Tesla model Y. Tekonsha P3. Easy peasy.

[Voyageurs]

Hi folks. I have been meaning to put this up for a bit. This is a how to on installing a brake controller in a Tesla model Y although I think it’s the same for a model X.

We are used to a Tekonsha so We went with the P3 this time.

You will need the pigtail from Tesla. 5 bucks. Mating it up to the Tekonsha wiring harness is not straight forward as the colours don’t match. Just use my pic and match from there. The only wires that match are blue to blue.

The connector is behind the carpeted kick panel on the left. Use a plastic tool and pull back the panel. You’ll see the little white connector tied off way down on the bottom. Connect the harness and coil up the excess behind the panel.

Mount the P3 with the wide provided bracket. You can see where we put ours. Two small screws.

Connect the controller harness to the back of the controller and you are good to go. You can connect it earlier as well as it’s kind of hard to see.

Here are some pics. You might have to orient them a bit. I suck at that. Hope this is useful for somebody in the future.

Cheers.

You can see the controller thru the left side of the steering wheel. Easy to reach for corrective action.

 

[MichaelMdG]

Can you flat tow (dinghy towing) a Tesla? If not, what is the purpose of the brake controller.

 

[Voyageurs]

Can you flat tow (dinghy towing) a Tesla?

Not that I know of. I wouldn’t do it. I don’t think they make base plates for them either.

 

[redbaron]

If not, what is the purpose of the brake controller.

This is for towing a trailer with a Tesla, controller the trailer brakes.

 

[Voyageurs]

This is for towing a trailer with a Tesla, controller the trailer brakes.

Correct. Trailers with electric brakes require a brake controller in the tow vehicle.

Cheers.