The Tail as Turn Backup Module for the 2017–2018 Subaru Forester Premium converts the factory rear tail light into a bright amber turn signal, improving visibility while keeping a clean OEM appearance. This module installs inline with the factory wiring for a true plug-and-play upgrade — no cutting or splicing required.
Watch the full install video below, or scroll down for the step-by-step written guide.
Table of Contents
- Installation Video
- Tools Required
- Installation Instructions
- Questions About the Install?
- Shop Subaru Forester Lighting at Ess K Customs
Installation Video
Tools Required
- Phillips screwdriver
Time Required: Approximately 20–30 minutes.
Installation Instructions
Step 1 — Open the rear lift gate to access the tail lights. Using a Phillips screwdriver, remove the two screws securing the tail light to the vehicle.
Step 2 — Pull straight back on the tail light to release the alignment pins holding it in place.
Step 3 — Unplug the factory tail light connector by depressing the clip and pulling it out. Plug the Tail as Turn module inline between the factory connector and the tail light.
Step 4 — If you're installing LED bulbs (sold separately), replace the factory turn signal and backup bulbs at this time. NOTE: The factory turn signal bulbs must be removed and either left empty or replaced with LED bulbs for proper Tail as Turn operation.
Step 5 — Before reinstalling the tail light, check bulb polarity. If an LED bulb doesn't illuminate, remove it, flip it 180 degrees, and reinstall.
Step 6 — Tuck the wiring neatly behind the tail light. Reinstall the tail light onto the vehicle and secure it with the original Phillips screws. Repeat Steps 1–6 for the opposite side.
NOTE: Any resistors included with LED bulbs may become hot during extended turn signal use. This is normal.
Questions About the Install?
If you run into any issues during the installation, contact Ess K Customs — as an authorized Diode Dynamics dealer, we're here to help.
Shop Subaru Forester Lighting at Ess K Customs
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This install guide applies to Diode Dynamics SKUs: DD3045, DD0113P, DD0109P, DD0116P, DD0143P, DD0144