Product Highlights & Compatibility

• The Sequential Tail Light Harness is a plug-and-play upgrade designed for 2005–2009 Mustangs.

• It upgrades your factory tail lights to sequential-style brake lights, turn signals, and hazard lights, mimicking the look of early Shelby models (1968–1970) and modern Mustangs.

• No need to buy a full tail light assembly — this harness-only solution is budget-friendly, priced around $100.

Features

Retro-Inspired Style with Modern Functionality
Bring vintage flair to your S197 Mustang with the Sequential Tail Light Harness Kit. Inspired by the iconic Shelby Mustangs from 1968–1970, this upgrade delivers classic sequential lighting effects while maintaining compatibility with your factory tail lights.

True Sequential Turn Signals and Brake Lights
The harness activates a sequential lighting pattern, starting from the innermost bulb and moving outward for turn signals and hazard lights. During braking, the lights sequence once and then remain fully illuminated — adding both style and clear signaling for enhanced safety.

Plug-and-Play Installation with Modern Components
Built using advanced electronic circuitry, this kit includes two pre-assembled inline harnesses — one for each side — that directly replace the factory wiring. No cutting, splicing, or modification is required. Just unplug the original harness and plug in it upgrade.

Simple, Hassle-Free Installation
Installation takes around 30 minutes and requires only basic hand tools. Designed for factory incandescent bulbs, the kit seamlessly integrates with your stock tail light housing and wiring system.

Note: This product is not compatible with aftermarket LED tail lights. Factory or compatible incandescent bulbs are required.

1. Installation Method & Compatibility Notes

This is a true plug-and-play system: no cutting, splicing, or permanent modifications required.

Simply transfer your OEM incandescent bulbs into the new harness sockets and reinstall into the original tail lights.

The harness comes with a weatherproof grommet to maintain factory-like sealing.

Not compatible with LED tail lights — factory or upgraded incandescent bulbs are required.

Easy installation rated 1 out of 3 wrenches, and takes about 30 minutes total.

2. Installation Steps Overview

Open the trunk, remove the plastic wing nut, and peel back the interior panel to access and remove the tail light.

Detach the factory harness, twist out all bulbs, and insert them into the correct labeled sockets (1-2-3) on the new harness.

Reinstall the bulbs into the tail light housing in the correct sequence and install the reverse light as well.

Feed the new harness through the body hole, seat the grommet, plug into the stock connector, and secure the tail light with the original nuts.

Test the lights before fully tightening to ensure proper sequencing.

Repeat the same process for the passenger side.

What’s in the Box

• (1) Driver Side Sequential Harness
• (1) Passenger Side Sequential Harness

Similar Products

Sequential Tail Light Kit – Plug-and-Play Harness 96-04 All Excluding 99-01 Cobra