headlights

2003 FORD F-150
200,000 MILES • V8 • 4WD • AUTOMATIC
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JAY SHIRLEY
my head lights dont work all other lights do if you pull back on dimmer switch they light up but when you let go they quit
Dec 9, 2010 at 6:37 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Sounds like a problem with the dimmer switch?
Mar 31, 2021 at 7:13 PM
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JAY SHIRLEY
  • MEMBER
  • 2 POSTS
thats what i thought so i put a new multifunction switch on yesterday and the lights came on so i shut them off and went out last night and when i went to turn them on they didnt work
Mar 31, 2021 at 7:13 PM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
In the diagram, fuse 3--30 amp should be hot all the time, use voltage tester on the fuse circuit. The red wire with yellow tracer carries voltage from the fuse to the multifunction switch. From the multifunction switch, also a red wire with yellow tracer carries voltage for headlamps. You may be able to get under your dash and find those two wires coming and going from the steering column, check for voltage. Did you check headlamp connector for voltage and ground?

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Mar 31, 2021 at 7:13 PM
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