How to Replace Rear Turn Signal Bulbs (3157) on a 2012 Jeep Wrangler
Step-by-step tail lamp removal guide with required tools, parts, safety tips, and 18 in-lb torque spec
How to Replace Rear Turn Signal Bulbs (3157) on a 2012 Jeep Wrangler
Step-by-step tail lamp removal guide with required tools, parts, safety tips, and 18 in-lb torque spec
🔧 Wrangler - Rear Turn Signal Bulb Replacement
On your Wrangler, the rear turn signal bulb is inside the tail lamp housing. You’ll remove the tail lamp, twist out the bulb socket, and swap the bulb, then reassemble and test the lights.
Difficulty Level: Beginner | Estimated Time: 0.3-0.5 hours
⚠️ Safety & Precautions
- Work on level ground and keep the transmission in Park (or in gear for manual) with the parking brake set.
- Turn the ignition OFF and make sure lights are OFF before starting.
- Let bulbs cool before touching; hot bulbs can burn you.
- Do not touch the new bulb glass with bare fingers; skin oils can shorten bulb life.
🔧 Required Tools
You'll need the following tools for this repair:
- Phillips #2 screwdriver
- Torx T20 driver
- Plastic trim tool
- Nitrile gloves
- Safety glasses
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Rear stop/turn bulb (3157) - Qty: 2
- Dielectric grease - Qty: 1
đź“‹ Before You Begin
- Open the tailgate so you can access the inner edge of the tail lamp.
- Identify your tail lamp fasteners: they are usually 2 screws on the inboard side of the tail lamp.
- Have the correct driver ready: use Phillips #2 if the screws are cross-head, or Torx T20 if they are star-shaped.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Remove the tail lamp screws
- Open the tailgate.
- On the inboard side of the tail lamp, remove the 2 retaining screws using a Phillips #2 screwdriver or Torx T20 driver (whichever matches your screws).
- Set the screws somewhere safe so they don’t drop inside the bumper area.
Step 2: Pull the tail lamp housing free
- Grip the tail lamp housing and pull it straight rearward.
- If it feels stuck, use a plastic trim tool to gently help it pop loose from the alignment pins.
- Pull straight back to avoid breaking pins.
Step 3: Remove the stop/turn bulb socket
- Find the stop/turn socket (it’s the dual-filament bulb socket).
- Twist the socket counterclockwise about 1/4 turn by hand, then pull it out of the housing.
Step 4: Replace the bulb
- Wear nitrile gloves.
- Pull the old 3157 bulb straight out of the socket.
- Push the new 3157 bulb straight in until fully seated.
- Apply a thin film of dielectric grease to the socket seal if it looks dry.
Step 5: Reinstall the socket and tail lamp
- Insert the socket back into the housing and twist clockwise to lock it.
- Align the tail lamp housing with its locating pins and press it straight in until it sits flush.
- Reinstall the 2 screws using a Phillips #2 screwdriver or Torx T20 driver.
- Torque to 2 Nm (18 in-lbs)
âś… After Repair
- Test the rear turn signals (left and right).
- Test brake lights and hazard flashers (the rear stop/turn bulb does both).
- If the new bulb doesn’t light, remove it and rotate it 180° in the socket (some bulbs/contacts can be finicky) and recheck.
đź’° DIY vs Shop Cost
Shop Cost: $60-$140 (parts + labor)
DIY Cost: $10-$30 (parts only)
You Save: $50-$110 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.3-0.5 hours.
🎯 Ready to get started?
HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.
