LIght Switch
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Senior User
Joined: Jun 2006
Posts: 309
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From: Toasty FLORIDA
LIght Switch
SO i have this very weird thing going on in my truck. if I turn on my light switch all the way out for headlight use my my rear light wont come on, my front orange light wont come on and my dash light wont come on. I have already replaced the switch, could it be a bad switch or what? 1988 f 250 4x4 302
Posting Guru
Joined: Jan 2002
Posts: 1,346
Likes: 8
From: Baltimore
Fuse #4 provides 12 volts for the parking/running lights and the dash back lighting.
If your horn and cigar lighter work the 12 volt feed going to the fuse panel for the #4 fuse is at least getting to the fuse panel.
If they don't work most likely the Black/Orange wire fusible link at the starter solenoid is blown. In that case the headlights also would not work.
If both work use a volt meter and see if the 12 volts from the battery is getting to the #4 fuse. It's hot all the time.
Here's a schematic of the fuse panel. #4 fuse is towards the bottom right of the schematic.
This is the schematic for the parking/running lights.
This is the schematic for the cluster lighting.
If your horn and cigar lighter work the 12 volt feed going to the fuse panel for the #4 fuse is at least getting to the fuse panel.
If they don't work most likely the Black/Orange wire fusible link at the starter solenoid is blown. In that case the headlights also would not work.
If both work use a volt meter and see if the 12 volts from the battery is getting to the #4 fuse. It's hot all the time.
Here's a schematic of the fuse panel. #4 fuse is towards the bottom right of the schematic.
This is the schematic for the parking/running lights.
This is the schematic for the cluster lighting.
