I am trying to wire up a Mitsubishi Alternator to my 12 volt battery bank. I have the battery positive connected to the B+ post and a cable going from the battery negative earthed on the alternator. The alternator is internally regulated and has 2 more terminals labelled S and L. Im led to believe that the S terminal is the voltage sensing terminal for the regulator and the L is for the lamp. I wired from the S straight onto the B+ post. With the L terminal i wired to a lamp then to a switch and then back to the B+ post. From what ive read when the switch is on the light should come on and once the motor starts up the light should fade out. This is not happening to my set up. Does anyone have any ideas why. Am I missing a vital wiring connection somewhere or have i got it completely wrong.