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post #1 of 9 (permalink) Old 08-18-13, 12:25 AM Thread Starter
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Headlight issue - not working

I have a 1987 ford f-150 4wd 300 six step side. Headlights or tail lights don't work. I've changed headlight switch and fender solenoid. Side markers work, interior light works, but no headlights. I see mention of a power control box, but I don't think this truck has one. Just the fuse box under the steering wheel on the firewall. Lights use to work, would go on/off when I hit a bump. Then one bump too many and no more head lights.

Any ideas?

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post #2 of 9 (permalink) Old 08-18-13, 06:34 AM
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Re: Headlight issue - not working

Sounds like a loose wire has finally given up the ghost. Since you said your tail lights aren't working either, you can probably rule out anything after the main light switch.


Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #3 of 9 (permalink) Old 08-18-13, 08:53 AM Thread Starter
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Re: Headlight issue - not working

Thanks, I'm terrible with wire diagrams. - isn't everything in the diagram past the light switch

Last edited by John.hardin; 08-18-13 at 08:55 AM. Reason: Quote
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post #4 of 9 (permalink) Old 08-18-13, 11:24 AM
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Re: Headlight issue - not working

Is there power at the black/orange wire at the headlight switch?

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post #5 of 9 (permalink) Old 08-18-13, 06:43 PM
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Re: Headlight issue - not working

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Originally Posted by John.hardin View Post
Thanks, I'm terrible with wire diagrams. - isn't everything in the diagram past the light switch
Yeah, pretty much, you still have the wire from the fuse to the switch.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #6 of 9 (permalink) Old 08-19-13, 06:14 AM Thread Starter
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Re: Headlight issue - not working

Does the fuse power the entire switch or each part of the switch have a fuse link? When I hit the dimmer switch, I see the dash high beam indicator come on, so at least it is signaling high beams. Does that mean there is power to the dimmer switch? Also turn signal indicators on the dash stay solid when turned on, like when a bulb is out. My test meter chroked and I haven't tested to see if I have power on the wire to the switch. One more thing, the switch gets hot when the lights are one. Seems too hot to me.

Last edited by John.hardin; 08-19-13 at 06:16 AM. Reason: Added info.
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post #7 of 9 (permalink) Old 08-19-13, 06:02 PM
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Re: Headlight issue - not working

Low beams, tail lights, et. al.are all from the same fuse. If they're gone, it's probably the fusible link. If your high beams are getting the dimmer switch hot, it may be time for a new dimmer.

Ever notice that there's so many high performance parts available for GM products?

Did you ever think that maybe they NEED them?
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post #8 of 9 (permalink) Old 08-21-13, 05:51 AM Thread Starter
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Re: Headlight issue - not working

When I purchased the truck there was a new light switch in the truck on the seat. I tried it and did not help. So I bought another. No change. Likely I have 3 good light switches and something else wrong. The floor dimmer is new also. I've got to trace done the fusible link. Something I haven't found where it is yet.
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post #9 of 9 (permalink) Old 08-21-13, 08:38 AM
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Re: Headlight issue - not working

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Is there power at the black/orange wire at the headlight switch?
Is there?

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