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Make Every Brake Tap Impossible to Miss
Distracted drivers are the biggest threat on the road behind you, and a standard third brake light does little to grab their attention in a split second. The Raxiom RAX388879 Third Brake Light Flasher splices into your Mustang's factory wiring and adds a rapid triple flash before the light holds solid, giving following traffic an unmistakable warning the instant you hit the brakes.
Key Features
- RAX388879 triggers a 3X flasher pattern before the brake light holds solid
- Improves rear end visibility in heavy traffic, rain, fog, and nighttime driving
- Splices directly into the factory third brake light wiring harness
- Compact module design tucks easily behind the trunk trim panel
- Compatible with V6, EcoBoost, and GT Mustang models
- Complements sequential tail light and turn signal upgrades for a customized rear end look
Fitment Table
| Year Range | Make | Model |
|---|---|---|
| 1994-2023 | Ford | Mustang |
Specifications
| Detail | Value |
|---|---|
| MPN | RAX388879 |
| UPC | Not published by manufacturer |
| Brand | Raxiom |
| Product Type | Third brake light flasher module |
| Installation | Splice-in, factory harness |
| Included | Flasher module only |
| Not Included | Third brake light or housing |
| Condition | New |
What's Included
- RAX388879 flasher module
- Wire splice connectors
- Installation instructions
About Raxiom
Raxiom has built its name on aftermarket lighting for Mustang and other popular platforms, engineering products like the RAX388879 flasher module to be simple, direct fit upgrades that add real function and style. The brand focuses on plug and play or straightforward splice-in installs so enthusiasts can upgrade their vehicle without a trip to the shop.
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FAQ
What is the RAX388879?The RAX388879 is a Raxiom third brake light flasher module for the Ford Mustang that makes the third brake light flash three times before holding solid when the brakes are applied. It is designed to increase visibility and warn following drivers faster than a standard brake light.
Does the RAX388879 fit my specific Mustang generation?The RAX388879 covers Mustang model years 1994 through 2023, spanning the SN95, New Edge, S197, and S550 generations. Wiring details differ slightly between generations, so follow the included instructions for your specific year.
Does the RAX388879 include the third brake light itself?No. The RAX388879 is the flasher module only. Your factory third brake light housing and bulb remain in place, and the module simply changes how the light behaves when the brakes are applied.
Is installing the RAX388879 difficult?Installation is a simple splice-in job that most owners complete in about 30 to 45 minutes with basic wire cutters and the included connectors, no programming required.
Will the RAX388879 work with LED third brake lights?Yes. The RAX388879 works with both stock incandescent and aftermarket LED third brake lights since it operates on the power wiring rather than the bulb type.
Does the RAX388879 affect the factory brake light circuit or trigger warning lights?No. The RAX388879 splices into the existing brake light circuit and does not interfere with the factory brake warning system or dash indicators.
What is the warranty on the RAX388879?Raxiom backs the RAX388879 with a 3 year limited warranty against manufacturing defects when installed and used according to the included instructions.
Can the RAX388879 be paired with sequential tail lights?Yes. Many Mustang owners install the RAX388879 alongside a sequential tail light kit for a fully customized rear end lighting setup.
Install Instructions
- Open the trunk and remove the trim panel covering the factory third brake light wiring harness.
- Locate the wiring harness feeding the third brake light and identify the positive and ground wires.
- Cut the third brake light wire, leaving enough slack on both ends to attach the RAX388879 connectors.
- Connect the solid wires from the RAX388879 module to the chassis side of the factory harness.
- Connect the remaining wires from the RAX388879 module to the brake light side of the harness.
- Secure all connections with the included splice connectors and tuck the module safely out of the way.
- Reinstall the trunk trim panel.
- Test the brakes to confirm the third brake light flashes three times before holding solid.
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