Brake Controller and Wiring for a 2003 Dodge Ram

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Question:

I have a Dodge Ram 2500 Yr 2003. Im getting a trailer with brakes and would like to put a trailer brake in. What device do I need and do you know what the attachment under the dash looks like. I have a small grey one and a Lrg Blue one under the dash neer the emergency brake.

asked by: Cody

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Expert Reply:

To view a picture of what the plug under your dash should look like you can view our Dodge brake controller guide, click on the provided link.

If your truck was equipped with the factory installed 7-way trailer connector, installation will be simple. If you have not already chosen a brake controller, I would recommend the Tekonsha Prodigy P2, part # 90885 along with the wiring adapter, # 3020-P. One end of the wiring adapter plugs into the blue connector under the dash, the other end attaches to the controller. Look for a white plastic box mounted to the firewall behind and above the emergency brake pedal. The connector will be above or next to this box.

expert reply by: Andi

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Answer 1

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 2

You do have the option to utilize the air brakes on your 2023 Freightliner Cascadia to control electric trailer brakes using the Hayes Air Actuated Trailer Brake Controller, part #HA100400C. However, we mostly recommend just using an electric brake…

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Answer 3

I do have a solution for your 2024 Kia Telluride that has the LED taillights that does allow it to have both a 4-way and 7-way plus install a brake controller but it is not with the #TK74CR which does not work for you based on the LED taillights.…

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Answer 4

You are correct, you should only be getting output when the brake is applied, or the override switch is activated. It sounds like the controller might be bad, but to make sure, you should probably bench test it before tossing it. Use a circuit…

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Answer 5

Hi Bruce, To lift your trailer we'll first need to check of the suspension and see if you have torsion axles or a leaf spring suspension. If you have torsion axles then I'll need to see the axle tag in order to determine what you have so I…

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Answer 6

Hey John, so the correct amount of spring bar tension will be based on the trailer's tongue weight and how it affects the suspension of your Nissan Frontier. Every WD system is a little different but what it comes down to typically is measuring…

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Answer 7

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 8

You are on the right track. Since your vehicle had a factory 4-way and you installed a 7-way the brake output circuit has been partially ran on your vehicle. It stops at the connector that is located under the driver's side wheel well. In order…

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Answer 9

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 10

The remaining wires from the 4- to 7-Way adapter #37185 will need to be hardwired in to your 2003 Dodge Ram 1500 to make the 7-Way fully functional. The blue wire is for electric brakes, black is for 12 volt power, and purple is for reverse lights.…

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Answer 11

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 12

It sounds like your 2008 Ram 1500 has a factory 4-way connector instead of the factory 7-way connector. To add a 7-way connector you will need the #ETBC7 which will plug into your 4-way connector and you will just need to make a few more connections.…

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Brake Controller and Wiring for a 2003 Dodge Ram

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