Troubleshooting Prodigy P3 Brake Controller On 2014 Toyota Tundra

Question

Question:

I have a 2014 Toyota Tundra with the Tekonsha P3. It is set up for plug-and-play, so installing the brake controller was simple and no problems. I just installed new electric trailer brakes and new wiring including a new 7 pin trailer plug on a utility trailer. It has a single axle, 12inch drum brakes. After wiring, I jacked up the left wheel to test the brake, and everything worked properly when applying the manual brake on the P3. Then a few minutes later I switched to the right wheel and tested that brake. This time the P3 displayed no trailer connection, and no longer applies the brakes. The wiring and connections are good, the grounds are attached to clean frame metal, and nothing changed between the time I checked the left and right wheels. Is it possible there is a blown fuse somewhere or some other open circuit I can check for? Thanks in advance.

asked by: David

0

Expert Reply:

This is a tough one. Finding the source of the problem can be really tough and time consuming.

Unfortunately, if your P3 # 90195 is receiving power and showing a display, the problem will be in the wiring somewhere between the brake controller and the brakes, and not any of the fuses. When you said that the brakes are no longer being applied, I assume you are talking about both sides. If just the right side is not working, then the problem will be in the wire that splits on the harness and goes to both of the brakes.

You will need a circuit tester like part # PTW2993 to test the wires. First check the blue wire coming from the brake controller to make sure it is receiving current when applying the manual brake on the controller. If you have current, you will want to move to the Tundra wiring harness and test the current going in and coming out of the brake circuit. Then plug the trailer in and test the back of the trailer plug for current.

You will then need to keep checking the wiring back until you have verified current all the way to the brakes. If the problem is intermittent, you may want to make sure the wiring harness is grounded correctly and free of corrosion.

I have attached a couple of helpful articles and a drawing that you can check out.

expert reply by: Jeffrey L

0

click to enlarge

Answer 1

It sounds like the problem is corrosion or a short somewhere on the vehicle side of your brake controller wiring. The most obvious place is at the 7-way at the back of your vehicle. I would check the front and the back of the connector for corrosion…

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Answer 2

I am not entirely sure what process you took so I'll give you some other things to try, or maybe a different way to test the Prodigy P3 #90195. First, sever the blue wire a couple inches from the back of your controller. Then use a circuit tester…

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Answer 3

The OL code that you are seeing on your Prodigy P2 brake controller indicates that the brake controller is seeing an overload. Possible causes for this are a short on the electric brake wire or a poor ground connection. The first and easiest step is…

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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

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Answer 7

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Answer 8

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 9

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

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Answer 10

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 11

Sure, I can help with that. I can see why the fitment notes are confusing. For a 2012 Toyota Tundra with the factory tow package and factory 7 way connector, you'll want a brake controller that plugs into the factory brake controller port under…

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Answer 12

Hey Roy, welcome back! The mounting hardware available for the Batwing Awnings attaches to crossbars or platform racks. I don't have a way to attach a Batwing awning directly to the side or top of your Popup camper and Rhino-Rack doesn't…

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Troubleshooting Prodigy P3 Brake Controller On 2014 Toyota Tundra

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