High Beam lights

Asked by Dec 10, 2015 at 12:42 PM about the 2008 Ford F-250 Super Duty

Question type: Maintenance & Repair

When I try to turn my headlights on high beam, my headlights go off. All of the
rest of the light are fine

3 Answers

465

Highly unlikely that both high beam filaments decided to go bad at the same time. It happens though. Do a continuity test of the bulbs. The other prospect is looking for a short on just the high beam circuit. Do the lights ever blink back on, in high beam, if you wait a while?

66,525

This will more than likely be a bad dimmer switch in column.

69,755

I would replace the bulbs or at least inspect them. It is not unusual for both bulbs to go out at the same time as they have been on for the exact same amount of time.

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