Left lowbeam out
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New User
Joined: Jul 2010
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Left lowbeam out
Hey any help would be appreciated. My left lowbeam stopped working on my 2003 F-350. I switch to high beams and I have lights. I changed the fuse and checked about everything else I could think of. I tried another light as well just in case, but 3 days in on this and still no joy. Thanks in advance for any advice.
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 23,174
Likes: 1,678
From: Stephensville WI
Do you have halogen bulb (aero) lights or sealed beams?
Check all of your wiring for signs of damage. Check the bulb socket for corrosion or dirt. Check the grounding point on the passenger side.
Check all of your wiring for signs of damage. Check the bulb socket for corrosion or dirt. Check the grounding point on the passenger side.
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
If it were the grounding point, the high beam would be affected as well since they share a ground. If the fuse is good, it is a wiring problem or a circuitry problem / corrosion in the central junction box. Start by turning the low beams on and checking for voltage at the bulb socket. If there is voltage, and no ground issues, then it's the bulb. If no voltage at the socket, check voltage at the fuse. If there is voltage at the fuse and not at the socket, then trace the wiring in between and check for damage. If no voltage at the fuse, then your central junction box has issues. They can be repaired, but my service manual says to just replace,
