Mando Alternator regulator excitation circuit wires

[Evinrude Boater]

I replaced the regulator on my mando alternator on a 1987 4.3 liter. The new regulator excitation wires are blue and red. the harness wires are red/purple and purple. Is it safe to say the purple harness wire should be connected to the new blue wire and the harness red/purple to the new red wire? Is there a chance of damage is they're reversed?

 

[Bt Doctur]

purple is the "switched" wire , 12v with ign on, red/purple is "sense" constant 12v. If reversed the motor will not shut off

 

[achris]

Is that new regulator MARINE (SAE-J1171)?

 

[Evinrude Boater]

Is that new regulator MARINE (SAE-J1171)?

I hope so. It was tested and repaired by a reputable alternator/starter shop.

 

[Evinrude Boater]

purple is the "switched" wire , 12v with ign on, red/purple is "sense" constant 12v. If reversed the motor will not shut off

I connected the red/purple to the regulator red and the purple to the regulator blue. Cross your fingers.

 

[Evinrude Boater]

It works. 14.52 volts at idle. Good enough for the girls I go out with.