2008 Evinrude E-TEC 55MFE Technical Manual, Page 122Get this manual
ELECTRICAL AND IGNITION SystemCheck CIRCUIT TESTS If the gauge lights do not turn on, turn the key switch OFFDisconnect the gauge 8-pin connector from the back of the gauge and turn the key switch ONTest for battery voltage between instrument harness terminal (purple wire) and terminal (black wire)the two connectors, replace SystemCheck gauge2
1Test adapter(s) 2Connector, SystemCheck gauge 42761 1Purple wire 2Tanblue wire
DRC6280
If battery voltage is present, replace the gauge If there is no battery voltage, check that 12 is