Question about Cars & Trucks
Yes, it is possible both are burned out. I recall a police car coming in for no high beams, after some diagnostics I found both bulbs out.
The vehicle probably uses relays under the hood (year, make, model???) if it is one relay it could have bad contacts. Have someone turn beams on and off, listen under hood (key on, engine off) for a clicking sound, this will be high beam relay.
Posted on Nov 22, 2013
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Posted on Jan 02, 2017
If there is power there, then it has to be the bulbs. The trouble that most people have is, they don't see how both bulbs could burn out at once... and they're right. They don't. But you see vehicles with one headlight all the time. They don't know it unless you tell them or they happen to see it themselves. Then the second light burns out, and they think it's a major catastrophe, when in fact, it's just bulbs. The high beam still works because the bulb is double filament. The only other thing it can be is the dimmer switch, and since you switched it to high, it appears to be working. However, if it's not bulbs, it still could be the switch.
Posted on Oct 07, 2009
It sounds like you are confused about how your headlamp system is supposed to work. The DRL does not run on the High beam circuit, it runs on the low beam circuit. The fog lamps are supposed operate with the park lamps and also with the low beams, not the high beams. From your description, I would say that your system is operating as designed and you are having trouble telling High from Low. (Don't feel bad, that is why high beam indicators were invented in the first place.)
Posted on May 08, 2011
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