Connection diagram for a 4 wire alternator 4.3L merc alpha

[cdavidson]

My son and I did not make notes of the alternator wire locations when we removed the alternator to have it rebuilt. Altrntr model 12174N 12v - 1996 4.3L merc alpha

Alternator terminals:
EXC =
S =
B =
E =

Wires:
Red =
Orange = Has the rubber protector
Black =
Purple =

Could someone please help us connect the wires to the proper terminals?
Thanks in advance.

 

[Don S]

Re: Connection diagram for a 4 wire alternator 4.3L merc alpha

 

[cdavidson]

Re: Connection diagram for a 4 wire alternator 4.3L merc alpha

WOW Don. This is perfect! Thank you for your help.
Alt is back on and appears to be charging but the output seems to drop a volt as the RPM increases. The belt was very tight and squeaky. I think the rebuild shop may have put on a larger pulley. Im pretty sure we got the belt on correctly. Do you have a diagram for the serpentine belt?

 

[Don S]

Re: Connection diagram for a 4 wire alternator 4.3L merc alpha

Larger pulley won't do that. Are you sure you have the A and B wires hooked up right? If you do, take the alternator back and have him recheck it.