Symptoms of a Bad or Failing Turn Signal Bulb

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Cost of Replacing a Bad or Failing Turn Signal Bulb

Common signs include the turn signal indicator coming solid, blinking very fast, and the turn light bulbs themselves not blinking. Our certified technicians can come to you and diagnose the problem. You will receive a $30 credit towards any follow-up repairs that result from the diagnostic. Following are example prices for Turn Signal Bulb Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2008 Buick Allure $77 $7.18 $70.00 32% $114.68
2012 Dodge Durango $77 $7.30 $70.00 32% $114.80
2005 Dodge Dakota $77 $7.30 $70.00 32% $114.80
2003 Audi Allroad Quattro $77 $7.26 $70.00 32% $114.76
2010 Acura MDX $79 $9.11 $70.00 32% $116.61
2013 Audi S4 $101 $30.96 $70.00 27% $138.46
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How to Diagnose a Bad or Failing Turn Signal Bulb?

turn signal bulb

Turn signal light bulbs are a common “wear and tear” item in your vehicle electrical system. The bulbs on most vehicles utilize a filament that literally burns up, in the same way that old incandescent household light bulbs would burn out at home. In some cases, a bad connection due to corrosion at the light bulb socket, or a wiring issue to the light bulb, can also cause a “no turn signal” condition. Since turn signals trigger both a front and rear turn bulb, most bulb failure scenarios can be easily diagnosed, although repair may best be left to a professional who will replace the turn signal light bulb. Some of the symptoms of a failed turn signal light bulb include:

1. Turn signal indicator in the instrument cluster comes on solid and does not blink

This is a common failure mode, and can be checked while your vehicle is stationary in your driveway or other safe location. To check to see whether it’s the front or rear turn signal bulb that has failed, walk around the vehicle after selecting a turn signal direction, to see which of the turn lights (for the turn side you selected), front or rear, is not illuminated. For example, a solid turn indicator for a left turn, with the front turn bulb on constantly, but no left rear turn bulb illuminated, indicates that the left rear turn light bulb has failed.

2. Turn signal indicator blinks very fast

This is another common failure mode. To check to see whether it’s the front or rear turn signal light bulb that has failed, walk around the vehicle (stationary and in a safe location of course!) to see which of the turn lights (for the turn side you selected), front or rear, is not illuminated. For example, a rapidly flashing turn indicator for a right turn, with the right front turn bulb blinking rapidly, but no right rear turn bulb, indicates that the right rear turn light bulb has failed.

3. Both turn light bulbs on the left, or both turn light bulbs on the right, do not blink

This is a common failure condition of the turn signal switch itself. A YourMechanic professional should inspect this condition and replace the turn signal switch if necessary.

4. Both right and left turn indicators do not work properly

This symptom may be observed if the hazard warning/turn signal flasher unit, which is integrated, itself has failed. This can be verified by pressing the hazard warning button in your vehicle. CAUTION: Only perform this test off the road in a safe location! If the left AND right turn signal indicator lights do not flash as expected, it is likely the hazard warning and turn signal flasher unit has failed. If the symptoms and diagnosis above indicate that the hazard warning and turn signal flasher unit has failed, a professional mechanic can replace the hazard warning and turn signal flasher unit.

Another possibility for this symptom is that an electrical overload in the turn signal circuitry has caused a fuse to blow, protecting the circuit, but not allowing the turn signals to function. A YourMechanic turn signal inspection will identify if this is the case.

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YourMechanic Turn Signal Bulb Replacement Service

Average Rating

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Number of Reviews

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Rating Summary
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Jarred

7 years of experience
19 reviews
Jarred
7 years of experience
Prompt and efficient. Obviously a skilled technician. I’m looking forward to using him for additional services, and I’ll be referring work associates to him
2006 BMW Z4 - TURN SIGNAL BULB REPLACEMENT (FRONT) - DENVER, COLORADO

Shaun

13 years of experience
238 reviews
Shaun
13 years of experience
Shaun was on time, polite, and very efficient with his work on my car. I was completely satisfied with the whole process.
2009 CADILLAC DTS - TURN SIGNAL BULB REPLACEMENT (FRONT) - CUPERTINO, CALIFORNIA

Daniel

8 years of experience
40 reviews
Daniel
8 years of experience
Daniel dealt with some difficult circumstances as best he could. I am satisfied and would call for him again.
1995 MAZDA MPV - TURN SIGNAL BULB REPLACEMENT (FRONT) - SAUSALITO, CALIFORNIA

Jeff

30 years of experience
438 reviews
Jeff
30 years of experience
Jeff was great, he showed up early and explained the whole process, gave him my car key and he was complete in about 45 minutes. He tested and showed me that the components worked, I thanked him and he was on his way. Will definitely schedule Jeff again for future service and will let my family, friends and colleagues know what an awesome experience it was. Thank you Jeff!
2011 MAZDA CX-7 - TURN SIGNAL BULB REPLACEMENT (FRONT) - RANCHO CORDOVA, CALIFORNIA

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