Cruise Control Stopped Working after Tekonsha P3 Installation

Question

Question:

Hello, I installed the P3 on a 2010 Toyota Sienna. I double and triple checked the wiring and everything is OK. The problem is now the Cruise Control doesnt work. The Cruise Control light stays on steady as it should when I turn it on at the same time the brakes are applied, and will stay on steady as long as the brakes are applied. But as soon as I release the brakes the Cruse Control light blinks and wont work. This is without a trailer connected. Ive tried everything I can think of. Any help would be greatly appreciated. Oh and by the way the trailer brakes seems to be working fine when using the P3 and the P3 doesnt give any errors when pulling the trailer. So Im fairly sure everything is hooked up properly. The only issue is the Cruise Control doesnt work!

asked by: Tim W

0

Expert Reply:

We have seen this issue before and when cruise control functionality gets affected after a brake controller install the problem is the stoplight switch wire that was used for the installation of the brake controller.

Basically the red wire of the Prodigy P3 Brake Controller # 90195 that you referenced isn't installed on the correct circuit. You want to find the circuit on your brake switch that only sees voltage when the brakes are applied.

I attached an FAQ on brake controller installation from scratch that you may find helpful.

expert reply by: Jameson C

0

Steve

3/24/2024

The harness purchased for 2008 tundra for P3 worked 2 years until it gradually ruined my cruise. I replaced cruise control but the issues with telonsha persist.

Jameson C.

3/28/2024

@Steve Are you sure that the P3 brake controller is at fault? It is not known to hurt cruise control.

Answer 1

Since your prodigy P3 is a proportional controller you can partially test for function at the trailer connector using the hook probe circuit tester #PTW2993. You can use this tester to test the pin the 5:00 position on your trailer connector while…

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Answer 2

Hey Austin, it sounds like your P3 part #90195 has a short from the 12 volt power wire (black) to the stoplight switch (red) and the brake controller thinks that you are applying the brakes and is activating the controller which is making it think it…

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Answer 3

Installing the Tekonsha Prodigy P3 Brake Controller #90195 that you referenced on your 2016 Silverado is just a matter of using the Plug-In Adapter #3016 that connects to the P3 at one end and to the factory port behind the dash of your truck at the…

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Answer 4

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 5

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 6

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Cruise Control Stopped Working after Tekonsha P3 Installation

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