Installing a 5-Way Flat Trailer Connector on a 2005 Toyota Tacoma

Updated 03/29/2011 | Published 03/28/2011

Products Featured in This Question

Hopkins Wiring Harness with 5-Pole Flat Trailer Connector - Vehicle End - 5' Long

(15)

$11.93

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

(742)

$51.94

Hook Probe Circuit Tester

(60)

$12.55

Question:

I have a 2005 Toyota Tacoma Double Cab and I bought part number HM37908. The 5 Way flat, to be used for a surge brake on boat trailer. My truck did not come factory with any kind of wiring harness. So, I need to know what colors on my truck to splice the wires in with so I can get it right and not burn anything up. A esay to read diagram would be helpful or any other answers you can give. Thanks for your time.

asked by: Shannon M

Expert Reply:

The easiest thing to do would be to install Tow Ready Custom Fit Vehicle Wiring, # 118393, first. There is no splicing involved with this installation. The T-connectors plug in line with the taillight wiring. I have included a link to the installation details and a video showing a typical installation.

After the harness is installed, you can install the 5-Flat Vehicle End, # HM37908. What you will need to do is cut off the 4-Way connector from the harness that was installed then splice the wires from the 5-Way to the wires that were on the 4-Way. They will match up color for color.

The blue wire will need to be connected to a reverse light wire behind one of the taillights. To make sure you have the correct wire, use a circuit tester like # PTW2993 to find the wire that provides a signal when the vehicle is put into reverse.

expert reply by: Michael H