What is the Headlamp Dimmer Switch?
The headlamp dimmer switch may be part of the turn signal switch or it can be mounted on the floor. This switch enables you to dim the headlamp beam from low to high or vice versa. A bad switch will not change the headlamp beam. Your headlamps being stuck on high beams can create a dangerous situation for oncoming drivers.
Facts to Note:
In many vehicles, the dimmer switch is part of a multi-switch that also controls the windshield wipers, turn signals, and cruise control. *Changing this multi-switch means all of those components will need to be re-wired.
How to Fix:
Examine the switch.
Remove and replace the faulty switch.
Check operation of the headlamps and verify the high/low beam switching.
It should be noticeable when your headlamp dimmer switches stops functioning. If you find that your vehicle is unable to alternate between high and low beams, then you should schedule a service.
Common symptoms indicating you may need to change the Headlamp Dimmer Switch:
Lights will not change between high and low beams. They will be stuck on one or the other.
Headlamps will not stay on high-beam setting.
Importance of this service:
The headlamp dimmer switch enables you to select between your headlamp’s high and low beams. When you pull the lever on your steering wheel column, the dimmer switch triggers the high beams, and either turns them on or turns them off. When the headlamp dimmer switch malfunctions, your headlights won’t be able to switch between high and low. You’ll either be stuck with only low beams, which can mean poor visibility, or you’ll be stuck with only high beams, which is hazardous to the drivers around you.