Chevy LS1 alternator wiring?

[Steve_D]

I have an LS1 going into a kitcar.
I have an alternator wiring diagram showing me the pinout of the plug as:-
S – Connects to the main power terminal of the alternator.
F – Not used
L – Connects to either a resistor from a +12V ignition supply or a charge lamp also from a +12V ignition supply.
P – Not used.

I also have a pinout listing for the engine ECU which tells me R15 is ‘Generator Turn ON Signal Terminal L’. I’m also told that this ECU connection is one of many that have to be in place for the engine to run.

I want to use a dash mounted charge warning lamp so can anyone tell me if I can leave this ECU pin disconnected?

Thanks
Steve

[Steve_D]

Thanks for the replies.
The sensing wire is logical but as you can see from this GM diagram it quite clearly says connect it to the power terminal.


I know the engine is 2002 but I have no idea which model car it belongs to.
Will get a part number off it in the morning and see if that helps.

Steve

[Steve_D]

Bit more research has brought up info that the ECU (PCM) will throw codes if it is not seeing the alternator so it looks like this car will have to go without an ignition light. In the original Chevy car the driver information centre would report charging faults so no need for a light.

I think I will extend the sensing wire up to the battery as this car is mid engine with the battery up front.

Thanks again for the help.
Steve