Help with new alternator pins.

[mdavidh]

Hey,
I'm finishing up a rebuild on a 5vz for my 98 4runner and am looking for some info on my replacement alternator. I had swapped the original alt for a cs144 (95 DeVille) for the increased amps. At the time for some reason I purchased a spare and was going to install it on the rebuilt engine. The alt has the same wiring plug but 3 external pins that I can not get any info on. I was hoping someone here may have a thought what they are and if I could just put some marine heat shrink over them.
Regards,
Matthew

 

[JohnnyG]

It seems aparent to me that these connectors replace the flat connector in the old alternator. For whatever reason, different model/different year, or better connections.
So, whatever plugged into that old flat connector will need to be modified to use the new style connector.

 

[mdavidh]

But the new one does have the same flat connector( plfs), as the old just the additional pins there.
I'm real confused

 

[mk378]

The pins are three phase AC output for the Cadillac windshield heater system. You can leave them unconnected.

 

[mdavidh]

Thank you!
I did find it was for the heated windshield (after many hours of searching) but was unsure if this was going to be a problem.
Appreciate the help!

 

[mk378]

As the diagram shows, when the windshield heater is not on (which is almost 100% of the time the car is being driven) the relay is open and the pins are effectively unconnected.