You may not use your vehicle's high beams often, but they are important. When you're outside of town on a dark night, high beams can be a big help. If they're not working, you could be putting yourself at greater risk on dark roads. It's best to check and make sure they're working before you need them. If they're not, it may be because of one of these four reasons--all of which should be fixed.
4. Burned-Out Bulbs
A burned-out bulb usually affects only one of the high beams. However, it's possible that it could cause both to fail. High beams are bright, so even one working bulb can still increase your visibility. Because of this, you may have had a bulb burn out without noticing it. If the second bulb burns out, then both will be off--and this is definitely noticeable. In either case, one or both bulbs will need to be replaced.
3. A Blown Fuse
If the bulbs aren't the problem, a fuse may have blown. You can replace the fuse and see if that solves the issue. If so, it may just have been a one-time problem. However, if the fuse fails again, there may be something else going on.
2. Bad Wiring
The wiring in your Chevrolet is complex, and damage to it can cause various electrical functions not to work. An electrical problem could cause fuses to blow, or it could directly affect your high beams' operation. Wiring problems are usually complicated enough that it's best to have it inspected by an expert.
1. Broken High Beam Relay
The high beam switch that you press isn't directly connected to the lights; it goes through a relay. When the relay is activated, it delivers electricity to the high beams. A broken relay won't send the necessary power to the lights, so they won't work. A failed headlight relay is one of the more common reasons our authorized Chevrolet and GM service center sees for high beams not working while the low beams do.
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