Mefi 4 Wiring Diagram Wiring Diagram Pictures

I also rewired the fuel relay "on/off" command wire "hot side"to come from the 10amp Fuse Block Inj/ECM (#2) as they have it in both first and second diagrams. The third diagram is how I found my unaltered wiring harness with a continuity test and had melted the MEFI Sytem Relay (R#2).. CBM Motorsports ECM Connector Pinout Identifi cation (1 of 2) 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

I got this from Indmar, but it applies to GM motors in Marine Applications and the MEFI linked motors. If you have diagnostics software, pages 49-50 give you values your boat should be in. This is a huge help in troubleshooting problems and pinpointing bad sensors. Attached Files MEFI 4 Linked Manual_troubleshooting guide.pdf(1.82 MB, 746 views). Wiring Schematics Distributor Kit Wiring Diagram J1939 to NEMA2000 Wiring MEFI 4 MEFI 4 Engine Controls Schematic 4.3L - 5.7L MEFI 4 ECM Circuit Board Layout (5.7-6.0-8.1L) MEFI 4 Engine Controls Schematic 6.0L MEFI 4 ECM Engine Wiring Diagram 8.1L 5.7L Wiring Harness Schematic (472605) MEFI 5 MEFI 5 Engine Controls Schematic 6.0L MEFI 5.