headlights
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headlights
this 83 f250 i recent got for dirt cheap, it shows its age.lots of body rust.
ALL the lights work except for low beam. high beams work, all marks and tail lights work, just not low beam.
could it be that both lights lots low beam? all my fuses are good
ALL the lights work except for low beam. high beams work, all marks and tail lights work, just not low beam.
could it be that both lights lots low beam? all my fuses are good
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
No low beams? Step on the dimmer switch, see what happens.
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Joined: Jan 2001
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From: Virginia
You need to get a testlight and poke around down at the switch and see if you have power passing through the switch at lowbeam position. You should have 3 wires down there, one coming in from the headlight switch and two going out. One out will be lowbeams, the other out will be highbeams.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 785
From: Simi Valley, CA
1960/90's myriad FoMoCo vehicles.
Lead Driver
Joined: Apr 2002
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You could do a continuity check on the headlights. Probably just need to test one. IIRC The ground is the driver side terminal and the high beam is the passenger side terminal. The low beam is the middle one on top. If you don't have a multimeter you can run test leads from the + battery terminal to the low beam terminal and the ground terminal to any good ground. If one side passes the good test order a new switch. The chances of both low beams going simultaneous is very low but possible. If one side tests bad check the other side. Quick check with a multi meter eliminates the possibility of both low beams going out.
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Two bad bulbs is not as far-fetched as it seems. After the first bulb failed, who knows how long you'd been driving like that, until the second bulb failed and only then was it obvious.
A co-worker (a VERY sharp mechanic) recently went through the same thing. After losing both low beams on the drive to work, he convinced himself an expensive control module was bad. I had to threaten him with corporal punishment if he didn't check both bulbs first. He reluctantly did and we all know the rest of the story. At least I didn't gloat. Too much. After the first week...
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