Alternator 4 wire to 2
#1
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Alternator 4 wire to 2
Anyone have any idea how I convert my old Merc. 4 wire over to a 2 wire system? I have older Motorola Alternators and want to change over the newer style.
Thanks in advance guys.
Thanks in advance guys.
#4
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Location: ST. Louis, MO, USA
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Simple. Connect the large (8 or 10g.) orange or red wire to the + post of the new alternator. The large black wire can go to the alternator body ground, - post (if it has one), or the block. The remaining 2 small (14 or 16g.) wires, purple and red, are not used. Be sure to cap these off so they dont short out. They still carry voltage.
Gary
Gary
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Dammmm!!! Too simple for my little brain. Thanks Gary. The purple and red are excitation, for what? I was looking at the schematic but just couldn't figure it out.
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Red is sensor, purple is excitation (switched ignition). You can use a 4 wire alternator on a 2 wire harness by attaching the sensor terminal directly to the + alt output. But you still need a wire to the ignition (purple) for the excitation terminal. That can go directly to the + terminal of the coil on a Tbolt IV.
Gary
Gary