Light issues

Asked by Nov 17, 2016 at 06:31 PM about the 2004 Ford F-350 Super Duty Lariat Extended Cab LB 4WD

Question type: Maintenance & Repair

I have a 2004 f350 diesel and my tail lights
go dim and when I turn my signal on both
tail lights and plate lights flash checked
flasher and grounds and replaced mfs
already and it gets worse when I hook my
trailer up help

1 Answer

109,835

Try cleaning the light bulb sockets and contacts. Are you saying this is only a problem when the trailer is hooked up or all the time? You could check the turn signal sending unit. If this is just when the trailer is hooked up then the trailer wiring is messed up.

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