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2015-2023 Ford Mustang S550

Installation Guide

2015-2023 Ford Mustang S550

Looking for the official user manual for your 2015-2023 Ford Mustang S550? This complete guide provides step-by-step instructions, a full tool list, and a video tutorial for installing your PrismBeam LED Tail Lights. Click to get started.

Ford Mustang 2015-2023

INSTALLATION GUIDE

Tools Required for Installation:

  • Ratchet
  • 10mm Deep Socket
  • Trim Panel Removal Tool (or Flathead Screwdriver)

Part 1: Remove Factory Tail Lights

Step 1: Remove Trunk Trim Panel 
Open the trunk and locate the large plastic knobs securing the rear trim panel. Unscrew them by hand and pull the trim panel straight up to remove it.



Step 2: Remove Side Liner Pins

Use a trim removal tool to pop out the plastic push pin securing the side trunk liner. Peel back the liner to access the tail light mounting nuts.


Step 3: Disconnect Factory Plug 
Locate the factory wiring harness connector. Press the release tab and disconnect the plug from the tail light housing

Step 4: Unscrew Mounting Nuts 
Use a 10mm socket to remove the three nuts securing the tail light to the vehicle body. Keep these nuts handy as you will reuse them.

Step 5: Remove Tail Light Assembly
From the outside, firmly pull the tail light assembly straight back to release it from the body clips. Remove the rubber grommet with the harness.

Part 2: Install New RGB Tail Lights 

Step 6: Feed Harness Through Body
Feed the wiring harness of the new tail light through the hole in the body. Firmly press the rubber grommet into place to ensure a watertight seal.


Step 7: Secure the New Light
Align the new tail light and push it until it clicks. Reinstall the three 10mm factory nuts from inside the trunk and tighten them securely.



Step 8: Connect & Test 
Connect the new tail light plug to the factory harness. Ensure it clicks into place. Test the brake, turn signs, and reverse lights before reinstalling the trunk liner


Part 3: RGB Setup

Scan the QR code on the box to download the control App. Connect via Bluetooth to change colors and modes


RGB / App Connectivity Issues
If you are experiencing connection or control issues with the RGB app, please check the following:
Phone Settings & Power: Ensure your phone's Bluetooth is turned ON.
Ensure Location Services (GPS) are turned ON (required for Bluetooth scanning on Android).
Important: The vehicle's Running Lights (Parking Lights) must be turned ON to power the Bluetooth module. Signal Interference:
Make sure there are no other strong signal sources inside or near the vehicle that could interfere with the connection.

App Installation:
Android Users: Please scan the QR code provided to download the App.
IOS Users: You can scan the QR code or search for the App name in the Apple App Store.

Pro Tip: If you previously used the "Light Running" app and are having issues, please try downloading "Star Light Running". This is the enhanced/upgraded version of the App. Synchronization Issues (One side not working):    
Most RGB kits use a physical wire to sync the left and right lights. If you can only control one side via the App, please check the Sync Signal Wire connecting the two lights to ensure it is plugged in securely.

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