Alternator/Volt Reg Wiring with LS Harness

[Wildkarde]

Is this a harness you are building, or one you've already bought? You can wire these alternators 2 ways, either through the computer for charge control, or just letting it charge all the time.

If going the computer route, the L terminal(pin B on the connector) goes to pin 15 on the red ecm connecto and the F terminal (pin C) goes to pin 52 on the red connector. Wired this way the ECM will control the alternators charging voltage.

If you dont want to go that route you can connect the S terminal(pin D) to switched 12V, and the L terminal(pin B) to switched 12v through a 470 ohm resistor. Not using the resistor will result in alternator damage. This setup will have the alternator charging at ~14V all the time.

The unused wires on the 4 pin alternator connector can be discarded.