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99 Expedition - No Low-beams

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Old 03-09-2015, 11:13 PM
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99 Expedition - No Low-beams

Left low beam went out about two weeks ago, and the right one went out this weekend. Replaced the right headlight so far but still no low-beam. Both high beams work fine, and both low-beam fuses are good.

Left fog light is also out, but haven't changed it out yet.

Ideas?!?
 
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Old 03-10-2015, 09:11 AM
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Once the left and right low beam wires leave the fuse box they have no common point between them. So the problem is at the fuse box, or you might have a critter eating your wiring harness. I know you said the fuses (26 & 28 right?) are good, but did you actually test for power on both sides of them when the low beams are on?
 
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Old 03-11-2015, 12:26 PM
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I did not check power across the fuses, 26 and 28, yet since I couldn't get to my multimeter or test light. Will try to do that in the next couple days. Any thoughts on the dimmer switch in the steering column as a culprit if there is power at the fuse box?
 
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Old 03-11-2015, 02:04 PM
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The power goes from the dimmer switch to fuses 26, 27, & 28. So if there is power at those 3 fuses with the low beams on, then the dimmer switch is fine. A bad dimmer switch also would not explain the 2 low beams going out at different times.
 
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