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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

electrical problem 64 f100

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Old Aug 20, 2010 | 07:35 PM
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joe cowan
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electrical problem 64 f100

OK Guys: This is the problem we are having. 12 volts is going to the instruments all the time whether the ignition switch is on or off. Changed the ignition switch for a new one. Same problem. Unhooked all wires from the switch including the plug that goes on the spades of the switch and still power is there at the gauges on the dash. By the wire diagram that I have I thought the yellow wire from solenoid post to the ignition switch was the only power coming into the cab. Am I right or wrong. I am hoping someone on here has had this problem or can offer some advice. It will really be appreciated. Joe in Ontario. You know I thought I knew something about electrical problems but the older I get the dumber I get.
 
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Old Aug 21, 2010 | 04:07 PM
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very odd. May have back feed or something wired wrong?
 
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Old Aug 22, 2010 | 04:08 AM
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Originally Posted by joe cowan
OK Guys: This is the problem we are having. 12 volts is going to the instruments all the time whether the ignition switch is on or off. Changed the ignition switch for a new one. Same problem. Unhooked all wires from the switch including the plug that goes on the spades of the switch and still power is there at the gauges on the dash.

By the wire diagram that I have I thought the yellow wire from solenoid post to the ignition switch was the only power coming into the cab.
COLF12250A .. Resistor Wire-Ignition Coil (Motorcraft DY37)

61.49" long / Color coded PINK / 1.30/1.40 ohms resistance / #20 gauge wire.

Fits all: 1960/73 FoMoCo Passenger Cars/Trucks/Bronco's/Econolines / Ditto: 1974/75's without DuraSpark Electronic Ignition.
 
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