What Wiring do I Need to Use a Brake Controller in My 1999 Ford Explorer XLT with 5L Engine?  

Question:

Expert Reply:

Hello Stephane,

Great question, let's get you the right wiring so we can get you out camping! You are going to need 2 different wiring kits to be able to use your brake controller.

First you are going to need to need the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55345, this wiring is a little more simple to install as it is considered a "plug-n-play" as it installs with connectors through your back tail lights. This wiring is what gets all your lights working. You will need to run a power line with a fuse from the batter back to the rear of the vehicle.

Then we are going to build off of that wiring to get you ready for a brake controller by installing the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7. This wiring takes quite a bit more work to install than the 4 flat, you will need to run the brake wire down, install some amps, etc (please refer to wiring diagram that I attahced). I do not have an install video on a 1999, but I do have one on the 1996 Explorer that I attached for you to take a look at to see if it is something you feel comfortable installing.

You didn't mention that you needed a hitch or ball-mount so I didn't include one. If you do need those other towing components just say the word and I will get you those part numbers.

Do you have your first trip planned for when things are set up? If so, where are you going?

expert reply by: Kate F

0

ETBC7 Wiring Diagram
(click to enlarge)

Kate F.

10/30/2025

Hey Stephane, how did things go getting the brake controller wiring set up on your Explorer? Were the Curt 4-way harness and the ETBC7 kit a good match for your camper’s brakes? Your update could make it easier for others working on a similar setup.