Can think of a number of possibilities but what was the voltage reading when the light came on ? "And the voltage is right at 14.5 all the time except upon acceleration when the SC comes on".


SC clutch probably pulls 10 amps. Is the battery light brighter with the headlamps on ?


One possibility is an open diode in the Alternator - will work but not at full rated power. Probably needs a load test with a clamp on DC Ammeter.