GT6 GT6 MK3 Alternator Problem

[Writer2022]

So I just got my new alternator for the GT6 MK3, but it's a bit different at the back. Does anyone know if I have to do something to this, or is it just the wrong alternator?

 

[Writer2022]

Apparently I've been told that it's the correct alternator, but the three connections in the shape of an L are not there on the new one. I really don't get what I'm supposed to do, because I have a connector to put on from the car. The two main connectors at the top are ok and should fit fine.

 

[Sarastro]

I'm not familiar with the application, but I can tell you this much. A regulator will have a connection for the high-current output and smaller terminal for the wire from the ignition light. There is sometimes a third connection for a "Sense" wire. That is connected to the point in the electrical system where you want the voltage to be controlled by the alternator's built-in regulator. There may also be a ground connection, usually to the housing. If you have those, you shouldn't need anything else.

Below is a wiring diagram I found on line. Looks like your alternator is as I suspected. The high-current output goes directly to the battery via the solenoid, and the sense wire goes to that multiple connection of the brown wires.

 

[TomMull]

I have a late '73 GT6 (KF222xx U) with a Lucas alternator that appears to be like your replacement one. I wonder if yours is an earlier 73 car. Triumph made a lot of changes to the GT6 in 1973.
It would be nice to keep the original connections but I think either alternator will work.
Mine does appear to be a replacement alternator but the terminal plug on the harness seems original and fits right on to it.

Tom

 

[TomMull]

Try research on "Lucas 5 wire alternator".