Component Tests and General Diagnostics
Component InspectionSONAR BUZZER
Disconnect the sonar buzzer connector M117, and apply battery voltage (approx. 12 V) to terminal +. Check the buzzer operation when terminal - is connected to battery ground.
REAR SONAR SYSTEM OFF SWITCH
Disconnect the rear sonar system OFF switch connector M116. Check continuity between the following terminals.
REAR SONAR SYSTEM OFF INDICATOR
Disconnect the rear sonar system OFF switch connector M116, and apply battery voltage (approx. 12 V) to terminal 3. Check the rear sonar system OFF indicator operation when terminal 2 is connected to battery ground.