2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 100Get this manual
1C-6 Engine Electrical Devices:
ECM Power Source Line
The ECM is battery dependent and must be provided with its own dedicated 12 power supplyThe electrical circuits which provide this supply are: 1The sub battery cable to the white lead wire in the remote control extension harness to the ignition switchWhen the ignition switch is turned "ON", battery power passes from the white lead wire, through the ignition switch contacts to the gray output lead wire to the No15 and 36 terminals of the ECMNOTE Ensure that the battery cable connections are clean and secureA failure at the battery connection will cause incorrect operation of the ECM and starter motor cranking system2The engine wiring harness to the main relayWhen the ECM main relay is energized, by turning the ignition switch "ON", battery voltage is supplied to the No12 terminal of the ECM2 1