Quote:
Originally Posted by ray_mcavoy
Yes, the larger of the two devices is the voltage regulator, smaller one is the horn relay.
The voltage regulator used with the generator does have 3 terminals (ones used with the 63+ externally regulated alternators have 4).
The 3 terminals on the generator style voltage regulator are:
B (battery) terminal -- Has a black wire that connects to the + battery terminal, a red power feed wire into the cab, and a red power feed wire to the horn relay.
A (armature) terminal -- Has a brown wire that connects to the "A" terminal on the generator and a red wire that runs inside the cab to the "GEN" light.
F (field) terminal -- Has a dark blue wire that connects to the "F" terminal on the generator.
There is also a black ground wire connecting from the voltage regulator mounting bracket to the "G" terminal on the generator.
To convert over to an alternator, you first have to determine if it's an internally or externally regulated alternator (there are both styles that use 3 wires).
An internally regulated alternator is probably the easiest to hook up and will involve:
(1) Remove the old voltage regulator and eliminate the brown & blue wires that used to connect from the regulator to the generator.
(2) Add a junction stud or junction block at the former voltage regulator location. Connect all 3 of the wires from the old regulator's "B" terminal to this new junction. Also run 2 new wires from this junction to the new alternator. Hook one to the alternator's output stud and the other to it's voltage sensing terminal.
(3) Connect the red "GEN" light wire (that used to go to the regulator's "A" terminal) to the new alternator's warning light terminal.
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i realize this is an old thread.. but Ray... i used this method and the GEN does not work now. any ideas or troubleshooting thoughts? 1962 c10 SBC 327, 12SI 94 Alt. cant figure it out. thnx