Troubleshooting Tekonsha P3 brake Controller No Output With Brake Pedal

Question

Question:

I have had the p3 for a number of years worked well last couple of years had not been used attached to small caravan didn’t work so bought a new tekonsha voyager Both controllers know trailer is there both work on manually but nothing without manual lever brakes on caravan are good Have checked most connections replaced one of trailer connections Would you be able to give me some ideas Thanks

asked by: Chris O

1

Helpful Expert Reply:

The # 90195 P3 and the # 39510 are both proportional controllers, so if you're testing for brake controller output with the brake pedal is pressed, you're not going to see any voltage with the brake pedal unless the vehicle is in motion.

You don't mention the year, make or model of the vehicle in question, but if you're not getting output from the controller while the vehicle is in motion, you might have a bad stop lamp switch or a blown fuse on the 3rd brake lamp. The stop lamp switch or the 3rd brake lamp circuit (depending on the vehicle) is what alerts the brake controller that the vehicle is braking, and if you're not getting signal in on the red brake controller wire with the brakes, you won't get output with the pedal. Early to mid 2000's GM trucks and full size SUV's had a known issue with bad brake switches, so this could be your problem.

I'll link to a brake controller troubleshooting guide that you might find helpful.

expert reply by: Mike L

1

Answer 1

Here's what I was able to find for error messages similar to what you listed for a Ram truck: SERVICE TRAILER BRAKE SYSTEM: This message will display when there is a problem with the ITBC system. If this message continues over multiple ignition…

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Answer 2

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 3

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 4

Hey Andrew! Yes, Furrion does have a Chill Cube model with a heat pump. This was actually just released for aftermarket sale. You will need a complete system to make the switch, new R32 units aren't backwards compatible with old R410A systems.…

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Answer 5

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 6

To install a Redarc Tow Pro Liberty in your 2023 Toyota Tacoma Sport you will need the following parts: Redarc Tow-Pro Liberty Brake Controller item #RED24FR Plug-and-Play Wiring Harness for Redarc Tow-Pro Trailer Brake Controllers item #RED99FR…

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Answer 7

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 8

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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Answer 9

Hello Mel, great question! Yes, the Torklift tie downs part #TL66FV will fit your 2006 GMC Sierra 2500HD crew cab with the 8 foot bed, provided your truck does not have running boards or cab length boards that extend under the bed, and you are not…

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Answer 10

Trailer wheel bearings are specific to the spindle that is installed on the axle that is on your trailer. You will need to safely support the trailer, remove the wheel and tire, remove the grease cap, remove the cotter pin and washer that secures the…

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Answer 11

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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Answer 12

Hey William, thank you so much for all of the information! To replace your axles, I recommend the Trailer Axle w/ Electric Brakes item #e73SR. This is a 6,000 lbs axle that come ready to install with pre-greased hubs and electric brake assemblies.…

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Troubleshooting Tekonsha P3 brake Controller No Output With Brake Pedal

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