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This is normally caused by the dimmer switch going bad. In fact, I know of no other possibility, other than the low beam of the driver's side lowbeam input wire being pinched or cut in two. The latter is a very slight possibility, but is still possible. It is very much more likely to be the dimmer switch being bad.

One lady brought me her Merc Sable, with that problem...both her dim lights were blown,and would only work on hi beam....sigh...some people....

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13y ago
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19y ago

First check the fuses then change the bulbs it is posable for both to go out

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19y ago

The problem is probably in the dimmer switch but it needs to be checked out.

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16y ago

Check the bulbs Check Hi-beam circuit breaker/relay Check the hi/low switch

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15y ago

Check fuse # 33 - it states headlights , DRL , gauge cluster

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Q: Why do low beams work but not high beams 1991 ford escort?
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