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Old 04-27-2009, 18:55   #1 (permalink)
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86 F250 dash lamps out

Hello, I have a 1986 F250 6.9l with every dash light out. I have stripped the dash down and determined it wasn't simply burnt out lamps.

I just bought the truck, it has an aftermarket stereo. The rest of the electricals work properly.

I am thinking it is a bad dimmer or the stereo causing this?

Thanks for your help.
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Old 04-27-2009, 21:00   #2 (permalink)
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Re: 86 F250 dash lamps out

Have you checked the fuse?
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Old 04-27-2009, 21:03   #3 (permalink)
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Re: 86 F250 dash lamps out

Quote:
Originally Posted by jwko View Post
Have you checked the fuse?
Yup, every fuse in it is new.
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Old 04-27-2009, 21:05   #4 (permalink)
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Re: 86 F250 dash lamps out

It Could be the dimmer.
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Old 05-02-2009, 15:02   #5 (permalink)
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Re: 86 F250 dash lamps out

Are you talking about just the illumination lamps, or even the warning & indicator lamps, too? The illumination circuit is LB/R & comes from the headlamp switch's potentiometer. The terminals on the headlight switch & its connector are known to burn, so inspect them carefully.
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