Parts Needed to Install a Brake Controller in a 1999 Ford Expedition with 4-Way

Question:

I Have a 1999 Ford Expedition, it has the factory hookup fur brake controller under the dash. It also has the factory 4 flat connector. Well part # 37185 work for me.

asked by: Charles B

Expert Reply:

One of the components needed to install a brake controller in your 1999 Ford Expedition is the part # 37185 that you referenced. You would also need a brake controller and install harness.

For a brake controller I would recommend the Prodigy P2 Brake Controller part # 90885. This is our best selling brake controller because of how well it works and how easy it is to setup. This is a proportional brake controller that senses the amount of braking the tow vehicle is applying and applies a proportionate amount to the trailer brakes.

Follow the 4-way trailer connector wires from the trailer connector to the front of the vehicle. These wires connect to a factory plug along the frame rail, usually on the driver's side, between the back tires and the rear bumper. The factory plug should be mated to another connector which has wiring that continues back toward the bumper. (See Picture)

There are more wires coming from the front of the vehicle than there are coming out toward the 4-Way plug. Ford wires the front of the vehicle as if it will be manufactured with a 7-Way plug, so all the 7-Way wires are run to this connector on the frame rail. This allows a 7-Way wiring harness to simply plug in line with the wiring coming from the front of the vehicle. If the vehicle were made with a 4-Way plug, it would plug into the same connector. Because a 4-Way plug would not require them, the additional wires are terminated at the pictured set of mated connectors.

expert reply by: Jameson C