obd2 to obd1 ecu pins question.
 

hello.
so I'm repining my ecu connectors to a P28.... and i noticed my car (97 hatch) are missing a few pins\wires.
PSP: power steering pressure switch.
FAN C: rad fan control
ALT C: alt control
and
ELD: electric load detector. (that i assume is ok cause some civics dont have it)
i tested the radiator fan and it works. on time.
but what about the ALT C? what is it?
do i need it?

i got ALT F (alt fr signal) though

thanks.