Suzuki 2003-2007 DF60 DF70 Outboard Motors Service Manual, Page 119Get this manual
ELECTRICAL
MONITOR-TACHOMETER
INSPECTION
MONITOR LAMP CHECK 1Connect the test cord as shown09930-89240: 4-pin test cord NOTE: This check can be performed without the test cord (Pno09930-89240)If it is not available, directly connect the battery to the terminal of the meter2Apply 12 power to the meterConnect the Gray wire to the positiveterminal, and the Black wire to the negative terminal of the battery"CHECK ENGINE" TEMP" OIL" REV "LIMIT"