1994 Johnson Evinrude "ER" 60 LV 150, 150C, 175 Service Manual, P/N 500611, Page 255Get this manual
f71 5With the engine running at 1000 RPM, the voltmeter should indicate volt If the voltmeter shows specified voltage, go to Step If the voltmeter shows less than volts, go to Step If the voltmeter does not show voltage, replace rectifier regulator6With the engine running at 1000 RPM, disconnect the tachometer and observe the voltmeterVoltage should increase approximately voltDisconnect the VRO pump's 4-pin Amphenol connectorVoltage should increase approximately volts If the voltmeter shows higher voltage than specified on both components, replace the rectifierregulator If the voltmeter shows higher voltage than specified on one components, replace that component7Complete all circuits disconnected for this testLeave adapter box in the circuitDo not energize primer solenoid when performing Steps 8, 9, and 10f71 8With the engine not running and the key switch in the "ON" position note the voltmeter reading If the voltmeter does not show voltage, the tachometer circuit is okayCheck the warning horn circuitRefer to Warning Horn, Section If the voltmeter shows voltage, go to Step 9f8l 9Separate the rectifierregulator gray lead bullet connectorRemove the voltmeter red lead from jack "C" and connect it to the rectifierregulator gray leadWith the engine not running and the key switch in the "ON" position note the voltmeter reading If voltmeter does not show voltage, go to Step 1O If voltmeter shows voltage, replace the rectifierregulator19l 10With the engine not running and the key switch in the "ON" position, connect voltmeter to engine wiring harness gray leadDisconnect the tachometer from the circuitCheck to see if voltage disappears, then disconnect the VRO pump's 4-pin Amphenol connector and check voltage If voltage disappears after disconnecting component, replace that component If voltmeter shows voltage after disconnecting both components, substitute the remote control wiring harness with known good harnessIf voltmeter still shows voltage, replace the engine wiring harness E u