How to Install: 2009-2018 Ram 2500/3500 Dually LED Sidemarkers

Form Lighting LED Sidemarkers for 2009-2018 RAM Dually.
September 29, 2026
How to Install: 2009-2018 Ram 2500/3500 Dually LED Sidemarkers

The 2009-2018 Ram 2500/3500 Dually LED Sidemarkers replace the factory fender lights with modern LED output and smoked lenses for an updated appearance. This installation guide will provide you with detailed instructions on how to install the 2009-2018 Ram 2500/3500 Dually LED Sidemarkers. Continue reading for step-by-step instructions below!

Table of Contents

Installation Tools

  • Flathead screwdriver

Installation Instructions

Step 1 — Access the rear sidemarker

If equipped, remove the screws securing the rear fender liner to access the back of the rear sidemarker. Locate the sidemarker connector inside the fender.

Step 2 — Disconnect the sidemarker harness

Use a flathead screwdriver to carefully push the red connector lock outward. Once the lock is released, disconnect the factory sidemarker harness.

Step 3 — Remove the factory sidemarker

Depress the retaining clip on the back of the factory sidemarker and push the sidemarker outward through the fender opening. Set the factory sidemarker aside. It will not be reused.

Step 4 — Identify the correct replacement sidemarker

Check the colored marking on the back of each FORM Lighting sidemarker before installation. Install the amber-marked sidemarkers in the front fenders and the red-marked sidemarkers in the rear fenders.

Step 5 — Install the FORM Lighting sidemarker

Slide the new FORM Lighting sidemarker into the fender opening. Press the opposite end into place until the retaining clip engages and the sidemarker sits securely against the fender.

Step 6 — Reconnect the sidemarker harness

Reconnect the factory harness to the new sidemarker and secure the red connector lock. Repeat Steps 1 through 6 for the remaining three sidemarkers. Reinstall any fender-liner screws removed during Step 1.

The installation is now complete. Enjoy your new 2009-2018 Ram 2500/3500 Dually LED Sidemarkers!


Questions About the Installation?

If you have any questions about installing the 2009-2018 Ram 2500/3500 Dually LED Sidemarkers, contact us via our support page.

Where Can I Buy the 2009-2018 Ram 2500/3500 Dually LED Sidemarkers?

If you're ready to upgrade your 2009-2018 Ram 2500/3500 dually with the 2009-2018 Ram 2500/3500 Dually LED Sidemarkers, visit FORMLights.com or use our Dealer Locator to find a dealer near you.

Want to know more about FORM Lighting products? Visit FORMLights.com and subscribe to our newsletter for new product releases and more!

This Installation Guide is for the following SKU: FL0059

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