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1973 - 1979 F-100 & Larger F-Series Trucks Discuss the Dentsides Ford Truck
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wiring....

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Old Jun 6, 2013 | 12:36 PM
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highoctane74's Avatar
highoctane74
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wiring....

All of a sudden my truck will no longer turn off with the key, I had to pull off the coil wire. Any ideas?

Also there is a larger gauge Black/yellow wire that I found cut inside the firewall harness. If I am not mistaken those wires are used to feed power to most accessories? The other 2 identical to it are hooked to my underhood fuse panel, should that one be also?

1979 F-250 supercab
 
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Old Jun 6, 2013 | 01:04 PM
  #2  
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highoctane74
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Well I figured out the Black/yellow. It was power for the heater motor. Still can't figure out ignition problem.
 
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Old Jun 6, 2013 | 04:42 PM
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fmc400
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Sounds like a bad ignition switch, or hacked up wiring. Since you've already found cut wires behind the dash, I suspect the latter.
 
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