How to Replace a Turn Signal Bulb

Easy to follow step by step guide on how to replace an automotive turn signal (blinker) bulb, though appearances may vary, the process is similar on most vehicles.

Difficulty Level - 3 of 10

Tools and Supplies Needed

• Mechanics tool set
• Replacement blinker bulb

Begin with the vehicle on level ground in park with the emergency brake set, engine "OFF", wear protective eyewear and gloves.

Step 1 - Identify the turn signal light (blinker) that has failed, insect both front and rear bulb operation.

Step 2 - Gain access to the rear of the lens by opening an access door or removing a few screws to remove the panel.

Step 3 - Release the wiring connector from the bulb housing. (Note: Some vehicles are designed with bulb socket attached, in this case turn the socket counterclockwise to remove.)

Step 4 - Grasp and turn the release fastener and pull the bulb housing plate from the lens.

Step 5 - Once loose, gently remove the bulb mounting plate which will expose the various bulbs including the turn signal.

Step 6 - Identify the failed blinker bulb, this failure is sometimes accompanied by a darkish color inside the bulb glass.

Step 7 - While holding the plate down, gently grasp the failed bulb and twist counterclockwise while pushing down slightly, then pull up to remove.

Step 8 - Once the bulb has been removed, inspect the bulb and socket for corrosion or damage.

Step 9 - Occasional a bulb electrical contact can become overheated and burnt due a to high resistance of a poor connection, this will hinder the new bulb operation.

Step 10 - Using a sharp tool such as an Exacto blade, clean the contact by scraping the terminal to expose new metal.

Step 11 - Match the new bulb to the old unit, they should match identically.

Step 12 - Its important that the bulb terminals are the same. (Some bulbs are designed with two terminals which can cause operational problems if installed.)

Step 13 - Once the socket has been cleaned thoroughly, gently install the new bulb by inserting it and twisting clockwise. (Do not over tighten.)

Step 14 - After inspecting all bulbs in the mounting plate the new bulb is ready to be reinserted into the lens.

Step 15 - Reconnect the wiring harness connector to the blinker bulb mounting plate.

Step 16 - Turn the ignition switch "ON" while engaging the blinker lever to operate the bulb to ensure the repair is done correctly.

Step 17 - Carefully reinsert the bulb plate onto the lens.

Step 18 - Work the plate into place while twisting the bulb plate fastener clockwise. (Do not over tighten.)

Step 19 - Once the repair is complete close the bulb plate access door.

Helpful Information

When replacing automotive bulbs use quality replacements to avoid premature failure.

Some vehicles are not designed with an access door, in these cases the lens or plastic covers may need to be removed.

Bulb and socket configuration will vary per manufacturer.