Adding a 7-Way Trailer Connector on a 1995 Ford F-250 with No Existing Trailer Wiring

Updated 10/30/2012 | Published 10/27/2012

Products Featured in This Question

Pollak Replacement 7-Pole, RV-Style Trailer Connector Socket - Vehicle End

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$16.16

T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(184)

$32.85

Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

(3399)

$119.84

Hook Probe Circuit Tester

(60)

$12.41

Question:

we are trying to install a 7 wire trailer plug on a 1995 f-250 that has never had trailer wires installed.i can only find 5 wires at the back of the truck in the factory plug.will i need to run new wires from the brake controll box or can i get what i need at the back of the truck

asked by: Don M

Expert Reply:

For a 1995 Ford F-250 that never had trailer wiring you will first need to install # 118316. Then you can install the 4- and 7-way installation kit # ETBC7. The other option is to use a circuit tester like # PTW2993 if needed to determine the functions of the wires you have found and hardwire them to the ETBC7 by cutting off the 4-Way end and splicing on the truck wires. On the ETBC7 4-Way, brown is running lights, green is right turn and brake lights and yellow is left turn and brake lights. Doing it this way, if the wires you found have the proper functions, would mean that you do not have to use the 118316.

The ETBC7 provides the 7-Way and the wiring needed to install the brake controller. I have included some links that will help with the installation.

expert reply by: Michael H