How to Change a Turn Signal Bulb on Vehicles

by Contributing Writer

The Vehicles is a hatchback economy car. The front turn-signal bulbs are located in the headlamp housing. The rear turn signals are located in the pillar of the hatchback door. Since working turn signals are essential to driving safely and legally, you should inspect your turn signals, and all other exterior lights, on a regular basis. If you find any turn signal bulb burned out, replace it before driving the Vehicles again.

Under The Hood:

 How to Change a Turn Signal Bulb on a 2002 Ford F-250

Front Turn Signal Replacement

Remove the key from the ignition and turn off all of the F-250's lights. Open the truck's hood.

Remove the two hex-head retaining screws located below the front turn signal assembly, using a socket wrench and a 6-mm socket. Pull the turn signal assembly out of the F-250's front clip.

Rotate the turn signal socket counterclockwise to unlock it from the turn signal assembly. Pull it out of the assembly. Pull the old bulb out of the socket and discard it.

Plug the new 3157K bulb into the turn signal socket. Insert the socket into the turn signal assembly and rotate it clockwise to lock it in place.

Slide the turn signal assembly back into the F-250's front clip. Reinstall the two turn signal assembly retaining screws with the socket and socket wrench. Close the F-250's hood.

Rear Turn Signal Replacement

Lower the F-250's tailgate to expose the two side-mounted turn signal retaining screws. Remove the screws with the socket wrench and 6-mm socket.

Pull the turn signal assembly off the back of the F-250 to expose the back side of the turn signal sockets. Rotate the turn signal socket counterclockwise to release it from the turn signal assembly.

Pull the socket out of the turn signal assembly. Pull the old bulb straight out of the socket and discard it. Plug the new 3157K bulb into the socket.

Slide the socket into the turn signal assembly and rotate the socket clockwise to lock it into the assembly. Reposition the assembly on the back of the F-250.

Reinstall the two turn signal retaining screws. Close the F-250's tailgate.

Items you will need

  • Socket wrench

  • 6-mm socket

  • Type 3157K bulb

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Front

Open the hood and reach down behind the headlamp housing.

Grab the turn-signal socket and twist it counterclockwise until you feel it release from the retaining ring. Pull the socket out gently to expose the bulb. Pull the old bulb out by hand and insert the replacement bulb.

Push the socket back into the hole in the back of the headlamp housing, making sure to line up the retaining tabs with the slots in the retaining ring. Twist the socket clockwise until it locks in place.

Rear

Raise the hatchback door. Slip your fingers beneath the lip of the trim panel that covers the backside of the tail-lamp housing. Pull the trim away gently. Set the trim aside

Grab the turn-signal socket and twist it counter clockwise until it comes free of the retaining ring. Pull the socket out of the tail-lamp housing. Pull the old bulb out by hand and insert the new one.

Push the socket back into the taillight housing and line the retaining tabs up with the slots in the retaining ring. Twist the socket clockwise until it locks into place. Line the retaining tabs on the trim panel with the retaining slots and push the trim back into place.

Items you will need

  • Replacement bulb

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Replacing the Front Bulbs

Start the car and turn the steering wheel all the way towards the opposite side of the light bulb you are replacing. If you are replacing the driver's side bulb, turn the wheel to the right; for the passenger's side bulb, turn the wheel to the left. Then stop the car. This turns the wheel so that it's not in your way.

Check under the inner fender directly in front of the tire. You should see a cover with a holding clip to keep it in place. Disconnect the holding clip using a flat-head screwdriver and then detach the inner fender cover.

Grasp the light bulb socket in the turn signal array and give it a one-quarter turn counterclockwise. Carefully pull it free.

Push the old bulb into the socket and turn it counterclockwise to disconnect it. Then pull it free.

Push the new bulb into the socket and turn it clockwise until it is secure. Replace the socket in the headlight array and turn it clockwise to set it in place.

Turn on the lights in the car without turning on the engine, and activate the turn signal. Have someone outside the car check to make sure it is functioning.

Snap the fender cover back into place and tighten the holding clip with the screwdriver.

Replacing the Rear Bulbs

Pop the trunk and remove any items that might be obstructing the turn signal array. In some models, you may need to pull the lining aside as well. (You can do this by detaching the pin holding it in place with a screwdriver.)

Grasp the turn signal light socket and turn it one-quarter of the way counterclockwise, then carefully pull it free.

Pull the bulb directly out of the socket and replace it with the new one. You can just push the bulb into place until you feel it touch the bottom of the socket interior

Put the socket back into the turn signal array and turn it one-quarter clockwise. Check to make sure it is secure.

Turn on the car's power and check to see that the turn signal is working.

Replace the items you moved and close the trunk.

Items you will need

  • Flat head screwdriver

  • Replacement turn signal bulb