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  1. L

    77 fj40 alternator

    I ran a new hot wire ( accessory ) to the voltage regulator on black yellow, and now its charging just like its suppose to, i evidentally have a short somewhere in the old one, which i'll be looking for . thanks for the advise and wisdom.
  2. L

    77 fj40 alternator

    Thats not what i'm getting.... and have checked fuses and wires. the white green or F pin on alternator is like a ground, when i check it from positive it completes circuit, and when i put 12v+ to it it makes a spark.... not good sign... thats what i'm trying to figure out.. Maybe my new...
  3. L

    77 fj40 alternator

    The white green wire, is it suppose to have a positive current from the voltage regulator or negative?
  4. L

    77 fj40 alternator

    the diagram i have says that the black yellow wire on the voltage regulator plug is Positive, but thats not the case.. It ties into ground.
  5. L

    77 fj40 alternator

    I have a multimeter and found 2 diagrams but are diffrent,
  6. L

    77 fj40 alternator

    I really dont understand the wiring on the altenator, is there suppose to be a positive feed going through the plug to the voltage regulator or just negetive ??? :meh:
  7. L

    77 fj40 alternator

    I have a 77 fj40 and the alternator stopped charging, i replaced with new one and still no luck, i'm thinking may be voltage regulator, or a wire, how can i bypass or test my regulator or troubleshoot my alternator, had it tested and its working on the machine.
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