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How to install a Raxiom 3rd Brake Light Flasher on your 1994-2015 Mustang

Installation Time

45 minutes

American Muscle
Shop Parts in this Guide

Step 1:
Remove or fold down the trunk lid appearance panel.
Step 2:
Locate the 3rd brake light wiring harness.
1999-2004:
Black
Green
2005-2009:
White/Blue
Black
2010-2014:
Black/white
Yellow/ Gray



Step 3:

Cut the 3rd brake light wires so that you have enough room to attach the Flasher wires with butt connectors. The solid wires coming off the module will connect to the chassis side of the wiring harness. The dashed wires coming off the module will connect to the brake light wires.


2015
Step 1:
Gently pull down on the rear head liner and unclip the 3rd brake light harness.
Step 2:
Locate 3rd Brake light wiring harness.
2015:
Black/Purple
Yellow/Gray


Step 3:

Disconnect the harness wiring harness so that you can make your connections, there is enough slack in the chassis harness if you pop it out of the clip holding it to the roof.

Step 4:

Cut the 3rd brake light wires so that you have enough room to attach the Flasher wires with butt connectors. The solid wires coming off the module will connect to the chassis side of the wiring harness. The dashed wires coming off the module will connect to the brake light wires.

**NOTE: the 2 wires are wrapped in a fabric tape, and shielding wire. You have limited space to splice it in.


Wiring Diagram:
Red wire represents 12v when the brakes are applied. Black wire represents ground.
**Note: Be sure to use a test light on your vehicle as colors tend to change year to year from the manufacturer.


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