Now I'm confused.......

Charging, starting, lighting, gauges, HVAC

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hardtailjohn
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Now I'm confused.......

Post by hardtailjohn »

OK, '70 F100 4x4, 360, 4sp...all that stuff. I'm having some gremlins... when the key's shut off, the radio, fuel gauge, back up lights, and brake lights still work. :eek: I've replaced the switch (the whole switch, housing as well as tumblers) with new, replaced the solenoid (shouldn't have been, and wasn't that).....so now I'm confused and don't have the time to go troubleshooting the thing myself.... has anyone else had this happen???
Thanks in advance!
John
Never trust a grinning idiot holding a big hammer!
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Ranchero50
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Post by Ranchero50 »

The brake lights should work, do the other bits only work when the brake are on? That's kind of a wierd problem, especially if it's all unmolested under the dash.

Jamie
'70 F-350 CS Cummins 6BT 10klb truck 64k mile Bahama Blue

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bluef250
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Post by bluef250 »

The brake light should work anytime the brake pedal is pushed. Perhaps the switch is wired incorrectly or if this is a recent problem, your fuse block may have some issues. Tap the fuse box and see if the problem goes away. Generally, the radio power comes from an auxiliary position on the fuse box with switch on run, the fuel gauge power from the Instrument Voltage Regulator through the 14 amp fuse with the switch on run, and the back up lights power through the 14 amp fuse with the switch on run.
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