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later model alternator on RX-2?

Old 04-27-09, 11:51 AM
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Originally Posted by PureMdMa View Post
I have a Rx2 that was already converted to FB alternator but neither of the wires on the back plug were connected when I got it, the battery dies all the time and the alt isnt charging at all. Where is the plug in the factory position that I can hook the R Terminal to? Im pretty sure my Voltage Regulator is already gone also.

You need key on voltage to the "R" terminal on the back of the alternator.
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Old 04-27-09, 01:33 PM
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Thats what I pretty much figured out, Ive just gotta find out where to get a switched 12V at under the hood. I was hoping to be able to just get it from the original harness that the Voltage regulator would have plugged into.
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Old 04-28-09, 09:32 AM
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The 81-88 alternators need a 12v to trigger the field terminal (upper male connector on the 2 wire pig tail). just tap run a wire from this point to the igniters 12-V (trace the wire from coil + to igniter +).





Originally Posted by PureMdMa View Post
I have a Rx2 that was already converted to FB alternator but neither of the wires on the back plug were connected when I got it, the battery dies all the time and the alt isnt charging at all. Where is the plug in the factory position that I can hook the R Terminal to? Im pretty sure my Voltage Regulator is already gone also.
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Old 04-28-09, 11:37 AM
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Ah, thanks wacky, I was thinking you would know.
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Old 04-28-09, 01:02 PM
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here's a pix. disregard the loose wire.
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Old 04-28-09, 08:40 PM
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Wired it when I got home today, charging great now. Thanx for all the help.
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Old 02-15-12, 03:24 PM
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Simple and easy fix, going to do this when I get home
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Old 02-15-12, 03:56 PM
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Great write up!!!!!
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Old 02-16-12, 05:27 PM
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Upgrade to FC engine fuse block and at same time, run an 8 gauge cable from alternators B terminal, and move the stock white-red wire from B terminal to fuse block. This will prevent the upgraded alternator from over heating in and less clutter
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Old 07-23-18, 02:07 PM
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Hi Guys!!!! not to highjack the thread but im having the same issue I have a 73 RX2 and a 84 alternator/ engine 12a. all my wires are cut and spliced everywhere so its been difficult to figure it out.
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