Recommend 7-Way Wiring Harness Needed For 1999 Forf F-150 With No Trailer Connector At All

Question:

Hello, I have a 1999 ford f150 lariat. I am looking for a 7 way plug for it there is no existing plug on it at all. i looked under the truck and there is a connection on the wiring harness the one for the break lights. what part do i need? Thanks,

asked by: Jeremy

Expert Reply:

I believe the connector you found is the connector you will use to plug in the wiring for your 7-way connector. There should be a wiring connector along the drivers side frame rail at rear of truck between the rear wheel and the rear of truck (see FAQ and video).

To install a 7-way on your 1999 Ford F-150, you will need Ford Replacement OEM Tow Package Wiring Harness, part # 118242, which includes all necessary adapters and fuses. Before installing part # 118242, you will want to disconnect the negative battery terminal. Then begin by plugging part # 118242 in-line with the plug on the frame rail of your F-150. Then you will need to connect the ground wire and plug the included fuses and relays into the fuse block under the hood.

For the installation of a brake controller, you will need the Ford wiring harness that will plug into the vehicles brake controller port found under the dash, part# 3035-P. The other end of the adapter will plug into the back of the brake controller.

If you do not already have a brake controller, I recommend the Tekonsha P2 Brake Controller and Wiring, part # 90885.

I have linked and FAQ on brake controllers for 1997-2004 Ford Trucks which illustrates the location of the plug for a 7-way. I have also linked a video installation of a brake P2 Brake Controller and Ford OEM Wiring Harness, part # 118242, that you may find as a good reference. Instructions for the Tekonsha P2 Brake Controller and Adapter, part # 90885-3035P are also linked.