Symptoms of a Bad or Failing Headlamp Dimmer Switch

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Cost of Replacing a Bad or Failing Headlamp Dimmer Switch

If you can't remain on high beams or switch between low and high beams, you may need to replace the headlamp dimmer switch. 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 Headlight Dimmer Switch Replacement. Click on the button below to get an upfront quote for your car.

Cars Estimate Parts Cost Labor Cost Savings Average Dealer Price
2005 GMC Sierra 1500 HD $347 $151.18 $196.00 23% $452.18
2011 GMC Yukon XL 1500 $233 $37.18 $196.00 31% $338.18
2005 Jeep Wrangler $156 $86.38 $70.00 19% $193.88
2009 Mini Cooper $191 $121.18 $70.00 16% $228.68
2014 Infiniti Q60 $124 $53.66 $70.00 23% $161.16
2010 Ford Mustang $162 $92.38 $70.00 18% $199.88
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How to Diagnose a Bad or Failing Headlamp Dimmer Switch?

headlamp dimmer switch

The headlight dimmer switch is the electrical switch that is used to control the vehicle’s headlight functions. For some vehicles it is a lever that is mounted on the steering column, while on others it may be a button or knob mounted on the dashboard or center console. The dimmer switch is primarily used to switch between the high and low beam headlights, however in many vehicles it also controls the vehicle’s interior lights as well.

As the dimmer switch is used quite frequently, every time the vehicle’s lights are turned on, it can be susceptible to wear over time and eventually need to be replaced. Usually a bad or failing headlight dimmer switch will produce a few symptoms that can alert the driver of a potential issue.

1. Problems switching between high and low beam

One of the first symptoms of an issue with the headlight dimmer switch is problems switching between high and low beams. If the dimmer switch contacts fail or wear out it may cause issues when switching between or turning on the headlights. A bad switch may not work on certain settings, which will leave the vehicle without that particular set of lights. Depending on which lights are affected, this may problems that may render the vehicle unsafe to drive at night.

2. Headlights stuck on one setting

Another symptom of a faulty headlight dimmer switch is headlights that are stuck on one setting. If you notice that the headlights remain stuck on either high or low beam then that may be a potential sign of a bad dimmer switch. A dimmer switch that is stuck on low will leave the vehicle without high beams, while one stuck on high will leave the vehicle without low beams and blind other drivers on the road if the vehicle is driven at night.

3. Headlights do not function

Another symptom, one of a more serious issue, is headlights that do not function. If the dimmer switch breaks it may not be able to turn the headlights on at all. A vehicle without headlights will have very low visibility both on the road and for the driver, and is not safe to drive, especially at night or in the dark. Headlights can also be disabled by a wide variety of other issues, so having the vehicle properly diagnosed is highly recommended.

The headlamp dimmer switch is one of the most important switches on the vehicle, and can cause a compromise in safety for the vehicle when it goes out. If your vehicle is displaying any of the symptoms above, or you suspect that your headlight dimmer switch may be having an issue, have the vehicle diagnosed by a professional technician, such as one from YourMechanic, to determine if the switch should be replaced.

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