Join Date: Dec 2012
Location: North of Pittsburgh
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Figured I bring this topic back up cause I have not found the problem yet. Attached is a video of the headlight/s flicker. When the light flickers on, so does the instrument cluster lights. Also, when they flicker, the cab clearance lights and lights on the dump bed dimmer ever so slightly from the quick power draw from the headlights. The truck does not have daytime running lights, or sensor on dash, etc.
If I pull a low beam fuse under the hood for the left light, the right one comes on then the flashing stops. Same thing happens when I replace the fuse and pull the other one.
When it is quiet enough outside to hear a pin drop, the truck doesn't make a sound when it is doing this. Not one relay is clicking anywhere. It acts like a transistorized module is going bad that controls the headlights. Is there a module to control the headlights?
Watch the video. The flicker is consistent at roughly 4 seconds always. What do you think?
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 in Turbo Aft, Terminator Pump, Diesel Innovations 99+ SS Up Pipes - Cut / Rewelded To Fit My Early 99, Donaldson Air Filter Setup, 75# Fuel Pressure Regulator Spring, Homemade Hutch Mod, Gauges, Newer Clear Headlights and Markers w/ Hella Bulbs, New Mirrors
Last edited by 7.3early99F550; 12-31-2013 at 10:02 PM.