Alternator wiring when using standalone ECU

[Hobby Racer]

Thanks Bob, you the man I'll try that this weekend.

Although, once the alternator self excites and the voltage on both sides of the resistor are equal, there would no longer be any current flowing and hence no heat right? So the resistor does not need to be so beefy as its only has current flowing for a brief moment until the alternator self excites right?

[Bob_n_Cincy]

Thanks Bob, you the man I'll try that this weekend.

Although, once the alternator self excites and the voltage on both sides of the resistor are equal, there would no longer be any current flowing and hence no heat right? So the resistor does not need to be so beefy as its only has current flowing for a brief moment until the alternator self excites right?

Yes, BUT
if you have an alternator failure, belt failure, or just forget to turn off the key. the resistor or light stays on.
Bob

[Hobby Racer]

Yes, BUT
if you have an alternator failure, belt failure, or just forget to turn off the key. the resistor or light stays on.
Bob

Good point. better safe than on fire.