How Much Voltage Should be On the Red P3 Trailer Brake Controller Wire

Question

Question:

I am looking at the Prodigy P3 brake controller, but I need to know the minimum voltage that is required on the red wire for the unit to activate? Thank you for your help.

asked by: Brandon

0

Expert Reply:

The red wire is the input wire telling the brake controller that you have stepped on the brake pedal. This should be a 12 volt wire on the cold side of the brake switch if hardwiring the controller. Some vehicles, like the 2013 Chevy Silverado, already have a tow package wire bundle under the dash, to the left of the steering column, held together with a white tag. The white tag also should have the functions of each wire on it.

The brake controller wiring is black for 12 volt power to the controller, white for ground, red for input to the controller, and blue for output to the trailer brakes.

Some vehicles, again like the 2013 Chevy Silverado, may require additional connections under the hood to make everything fully functional. I have included a link to a how-to article that explains these connections.

expert reply by: Michael H

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Answer 1

The Tekonsha Prodigy P3 #90195 has the ability to show a few different voltages when your vehicle is parked. The first option is your tow vehicle battery voltage which should be at least 12V if not more. The second is output power from the stoplight…

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Answer 2

Since you have a brand new tow vehicle and a new Tekonsha P3 brake controller I would first focus your troubleshooting efforts on the wiring in the trailer. Something is causing an excessive current draw from the controller. The most common causes…

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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

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 5

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 6

Hey Jeremy, Typically with boat trailers the manufacturer will install hydraulic surge brakes because you don't have to worry about the water damaging wires like you would with electric brakes. That being said, if you use a heat shrink butt…

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Answer 7

The Redarc Tow-Pro Liberty #RED24FR is the way to go over the Elite #RED44FR as you get the nicer functions of the Elite at a lower price. The Elite has the ability to be the more preferred proportional style of controller as well as a time-delayed…

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Answer 8

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 9

Sure thing, I will go ahead and list out what you need for your 2023 Kia Sportage to add a 7-way for a brake controller so you can tow with the Curt Trailer Hitch Receiver #C94WR: - T-Connector Vehicle Wiring Harness with 4-Way Flat Trailer Connector…

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Answer 10

If you have a vehicle specific wiring harness for a brake controller then that would indicate that you have a factory tow package and subsequently would already have a 7-way at the back of your vehicle. The universal 7-way connector #ETBC7 is meant…

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Answer 11

You're right, the mounting bracket is unique (in a good way) for the Curt TriFlex NEXT Trailer Brake Controller #C24VV. The bracket is smaller and all you do is put the included adhesive tape on the bracket and stick it wherever you like under…

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Answer 12

The P3 brake controller, #90195, will go into a sort of sleep mode after it detects no movement for 15 minutes. While it is on it does not draw very much power. What you can do to make sure it goes to sleep is exit the truck after turning it off,…

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How Much Voltage Should be On the Red P3 Trailer Brake Controller Wire

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