The alternator, which thinks it is a generator!
Replaces Lucas C42 dynamo right handed
High performance, lightweight dynamo replacement:
Austin Healey3000 MK III BJ8
JaguarE-Type 3.8 series I late (RHD OTS from 850092, LHD OTS from 875386, RHD FHC from 860005, LHD FHC from 885021)S-Type 3.8 without power steering
MGA 1600 MK II (from chassis 101840) police cars (requires a 1/2in wide fan belt and different pulleys)