Completing Tow Package Wiring on 2006 Dodge Ram 2500 with Factory 4-Pole Trailer Connector

Question

Question:

I have a 2006 2500 dodge and i have hooked up the electic brake controler to the oem outlet underneath the dash. problem being is that i have a 4 pin connector on the rear of the truck that has been connected to a 7 pin which i need to tow my trailer but there is a blue wire, purple wire and black wire coming from the 7 pin connector that is not hooked up to anything and the 4 prong adapter coming from the 7 pin adapter is hooked up to the 4 pin on the back of my vehical. Do i need to hook up the 3 hanging wires to have electric brakes.

asked by: Dusty

0

Expert Reply:

You are correct, at least two of those remaining wires will need to be dealt with in order for your trailer brakes to function.

On the Ram trucks equipped with the OEM 4-pole trailer connector, the blue brake output wire from the outlet under the dash simply ends in the engine compartment, and does not continue to the rear of the vehicle.

You might be able to access the blue wire in the engine compartment, behind the drivers side wheel well. Look for a wire connector as shown in the photo. There will be a larger gauge wire that is usually blue that carries the brake controller output. Tap a length of 10 gauge wire into the wire, and extend it back to the 7-way trailer connector, and attach to the blue wire. If you cannot find the connector behind the wheel well, you can tap into the blue wire on the brake controller pigtail before it plugs in under the dash. Then, run the wire back and attach to the blue wire from the trailer connector adapter.

The white wire on your 7-way adapter should be grounded to the vehicle frame. The black wire is used for a 12-volt accessory power feed for any trailer mounted accessories that might need power. If needed, this wire can be extended with a length of 10 gauge wire, part # 10-1-1 and ran to the positive battery terminal via a 40 amp circuit breaker, part # 9510. If you do not need the 12-volt circuit, the black wire can be taped up out of the way. The purple wire is typically used for reverse lights on the trailer, if needed. If not needed, it can be taped off as well.

I've linked you to some FAQ articles that you might find helpful.

expert reply by: Mike L

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click to enlarge

Answer 1

According to our records, the cold brake switch wire on a 2004 Dodge Ram 2500 should be a white/tan wire. Wire color is not always universal, so if you do not find a white/tan wire, you can use a wire tester like part #PTW2993 to determine wire…

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Answer 2

On my 2004 Dodge Ram (which would be the same as your 2003) the factory trailer connector plug split off from a larger wiring harness on the inboard side of the drivers side frame rail near the rear bumper. There should be a rectangular connector…

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Answer 3

Yes, it is very possible to install/fit a 7-way trailer connector on a 2004 Dodge Ram 1500. I first recommend looking under the vehicle for a square ten pin connector. This (if present) will be located behind the rear bumper near the spare tire and…

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Answer 4

You can add a 7-Way trailer connector and retain the use of a 4-Way as well by installing #37185. The 4-Way you have will plug into the 37185 and the remaining wires would have to be hardwired in. The white wire grounds to the truck frame. Black is…

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Answer 5

To install a 7-Way harness on your 1996 Dodge Ram without the factory connector, you will need two separate wiring harnesses because they don't make just one that'll do the job. The first harness you'll need is the Curt T-Connector…

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Answer 6

Yes, the wire colors of the Deka Wire - Jacketed 7-Wire #DK74FR are the industry standards that you mentioned. Black, white, red, green, white, yellow, and blue.

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Answer 7

Your easiest solution for wiring a new 7-way to your 2006 Dodge Ram 2500 that has the wire colors you mentioned is going to be to use a circuit tester like part #PTW2993 to test all the wire colors you have while applying various lighting functions…

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Answer 8

Yes, there will be fuses for the trailer lighting circuits on your 2006 Dodge Ram 2500 Diesel. In order to find out which fuse is responsible for the lighting circuit you are having an issue with you will need to look in the Integrated Power Module…

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Answer 9

If your Ram is equipped with the tow package including the 7-way trailer connector on the rear bumper, the connector for installing your brake controller will be located above the white junction box behind and a bit above the emergency brake pedal.…

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Answer 10

Check out the picture I attached plus the FAQ article to the right to see a 7-way diagram you could use to wire up your trailer.

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Answer 11

The problem with using 7-way wiring for a headache rack is that there isn't a dedicated stoplight circuit so if the rack has a third brake light you won't find the correct circuit at this harness. The turn signals, running lights, and reverse…

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Answer 12

There is no turn signal input on an electric brake controller so I am a bit confused as to what you are asking. On an electric brake controller there will usually be four wires; one for power, ground, brake output, and brake signal. The power wire…

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Completing Tow Package Wiring on 2006 Dodge Ram 2500 with Factory 4-Pole Trailer Connector

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