Join Date: Dec 2012
Location: North of Pittsburgh
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early 99 headlights blink "ON"
I have done a search on my particular problem and have come up with nothing.
The problem: when I turn the headlight switch to the parking light position, all parking lights come on, but, about every 4 seconds the headlight bulb and gauge cluster lights flicker on for .1 of a second. You can stare right at the headlight bulb and see the filament flick on for that .1 second without it blinding you.
What I have done: checked all fuses and relays - good, replaced the headlight switch and multi function switch with known good ones, checked the harness for burnt terminals for the headlight switch.
It is not the alternator or regulator cause this happens with the engine running or not. Once you move the headlight switch to any other position, it works like it should.
I have run out of ideas. What are yours?
Early 99 F550 4x4, 6 Shift, 11 Foot Flat Bed Dump, 11000# Empty, Always Loaded or Pulling Something up to 26000# GCW
G2 Wicked Wheel - 34psi Boost On A Factory Turbo, TS 6 Chip, 4" Exh, Terminator Pump, Bellowed Up Pipes, Donaldson Air Filter Setup, Billet FPR Housing, Homemade Hutch Mod, Gauges