1966 Ford Thunderbird voltage regulator harniss

Tiny
STEVETBIRD
  • MEMBER
  • 1966 FORD THUNDERBIRD
  • 89,000 MILES
The voltage regulator pig tail was cut off my tbird and tossed in the garbage. I have a new pig tail but the color of the wires dont match up on the cars harness I have 3 wires green, yellow and white. Could you tell me what wire going to the I a s f
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Saturday, June 22nd, 2013 AT 9:20 AM

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Tiny
DOCFIXIT
  • MEMBER
http://www.justanswer.com/classic-cars/3h9b8-proper-wiring-1966-ford-thunderbird-alternator.html go this site for a diagram
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Saturday, June 22nd, 2013 AT 10:27 AM
Tiny
RANDY B
  • EXPERT
"I" is "ignition". That will have battery voltage when the ignition switch is on.

"A" is the 12 volt feed circuit where system voltage is monitored. It will typically have full battery voltage all the time.

"S" is "stator". That wire goes to the terminal on the back of the generator with a white insulator. It will have half of battery voltage, about seven volts, when it is working. Ford is one of the few manufacturers that uses that to turn off the warning light on the dash.

"F" is for "field". That wire goes to the back of the generator with the red or orange insulator. Current flows through the regulator into that terminal, then through the spinning rotor to create the magnetic field. By varying the amount of current from 0 to 3 amps, it controls the strength of the magnetic field and therefore the amount of output current and voltage.
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Saturday, June 22nd, 2013 AT 10:37 AM

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