Obd2 m52 wiring ms41 e30 x20 m50 r3vlimited s52 read rpm redline 24v figured am Wiring m50 e30 S52 obdii info (adaptor wiring chart)
s52 OBDII Info (adaptor wiring chart) - R3VLimited Forums
E30 m50 wiring diagram
s52 OBDII Info (adaptor wiring chart) - R3VLimited Forums
E30 M50 Wiring Diagram - Wiring Diagram