Functions of Factory Brake Controller Wiring Harness on a 2014 Toyota Tundra

Question

Question:

I have the factory wire harness that was in the glove box for the electric brake controller. The wire harness has 5 wires and the harness from the controller only has 4. The Toyota trailer brake jumper harness wires are labeled as follows, black-red- fused trailer brake controller batt. Feed. Green- headlamp switch to vehicle trail lamps green- white- vehicle stop lamp switch to brake controller input. Brown- ground. Red- trailer electric brake feed from brake controller output. My question is which wire isnt used? Thanks for any help.

asked by: Terry

1

Helpful Expert Reply:

On the factory harness for your 2014 Toyota Tundra you will not use the Green- headlamp switch to vehicle tail lamps.

The brake controller wires are white for ground, black for 12 volt power, red for stop lamp switch, and blue for output to the trailer brakes.

The wire that is not used is often referred to as an illumination circuit and is not used by nearly all aftermarket brake controllers.

expert reply by: Michael H

1

Answer 1

If your 2014 Toyota Tacoma came with a factory installed 7-Way trailer connector then the plug-in for a brake controller should be there. Harness #3040-P is the correct one for your truck and a Tekonsha brake controller. I recommend the P2 #90885…

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Answer 2

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 3

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 4

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion…

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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

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…

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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

I recommend the Redarc Tow-Pro Liberty Brake Controller #RED24FR for your 2023 Toyota Tacoma with the factory tow package. You will be able to connect the wiring using the Redarc Adapter #RED99FR directly to the factory connector. We also have the…

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Answer 9

For sag from towing a trailer the best recommendation I can make is actually a weight distribution system. Suspension enhancement will help level your truck while towing. But the advantage to a weight distribution system is that it levels the…

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Answer 10

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 11

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two…

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Answer 12

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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