Bruce, from my notes the diode should be between blk with white trace and wht with blk trace, the banded end of the diode should be connected to the white with black tracer, then the non banded end to black with white tracer, this should be youir 'L' terminal, it'll be a switched 12v that prevents reverse current stopping the car from running with the ingnition turned off. White and yellow should be connected, this is the 's' terminal.
I don't have my car here to double check this though.