Wierd light problems on daily driver???
Thread Starter
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Mountain Pass
Joined: Jan 2005
Posts: 141
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Wierd light problems on daily driver???
On my 75 f100 it just started doing wierd things with the lights. The brake lights haven't worked for a while but I'm pretty sure that is the turn signal switch. What they just started doing is if I pull the lights all on or just the running lights they stay on for 8 seconds exactly if its cold. THen you can hear a wierd sound under the dash over by the light switch and fuse box like a blinker sound. THen the dash marker and tail lights all go off. After a while they flicker just for a split second and as they flicker the headlights dim. I need to figure this out because I work graveyard and have to drive to work in the dark and home. I searched the forums and it seemed like a new headlight switch would fix it I put a new one in and it does the exact same thing. So what do you guys think it is thanks for all the help.
Senior User
Joined: Mar 2004
Posts: 448
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check your dimmer switch on the floorboard, bet it is corroded maybe with a hole in it
it un-bolts from the floor, maybe screws, on the inside of the cab, wires are in a connector, so it's an easy changeout................5 minutes
and they are cheap<$5
fixed my problem dying headlights
for the brake lights, check for poor ground
wire from the socket harness to the bed, and the socket may be dirty/corroded
it un-bolts from the floor, maybe screws, on the inside of the cab, wires are in a connector, so it's an easy changeout................5 minutes
and they are cheap<$5
fixed my problem dying headlights
for the brake lights, check for poor ground
wire from the socket harness to the bed, and the socket may be dirty/corroded
Thread Starter
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Mountain Pass
Joined: Jan 2005
Posts: 141
Likes: 0
Put a new dimmer switch in and cleaned the terminals. How do you replace the fusible links on the started solenoid? I think i am going to try a light switch from a truck that I know it works on.
Fleet Mechanic
Joined: Mar 2004
Posts: 1,398
Likes: 17
From: Hesperia, CA
It sounds like you have a main power distribution problem. There might be some kind of a loose connection on the fuse panel. The headlights on most vehicles are not fused through the fuse panel but all of the ancillary equipment is. (Courtesy lamps, Tail lamps dash lamps, etc.) I would turn the headlights on and get a hold of that fuse holder and start shaking it. If the problem comes and goes then you have found the place where the problem is occurring. The next step is to find the loose or corroded connection and repair it. Electrical problems can be a real bear to find and fix. You just need to start at one end and start working toward the other. But I would start looking for a loose or corroded connection from the battery to the fuse panel. Start yanking and pulling on the wires with the headlights on. It is better to do this at night because you can see loose connections sparking. The clicking problem you are hearing could be the circuit breaker. If so then you might have a short in the tail light wiring somewhere.
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Mountain Pass
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