Can the FC Alternator be made to regulate voltage without the ECU?

Right now its constantly charging up with it unplugged from the computer.

 

I might try to put an external voltage regulator on it.

 

neither the Fc series 4 (86-88), series 5 (89-91) or the FD alts require an ECU to function.



It doesn't "plug into the computer". The wiring harness that plugs into the alt is connected to the ignition switch.



I suggest you get the wiring diagrams.

 

Your correct, thank you.