2003 LQ9 3 wire alternator
Most of us here don't do conversions where we have to worry about which to resistor to run.
You need to run your turn on wire to the L terminal and run a resistor if you're putting that alt into a vehicle it didn't come out of and you're going to be controlling it off the key instead of the GM PCM
Check in the conversions and hybrids section here on LS1 tech and you'll get better info
But here's a video explaining the resistor





