1996 Johnson Evinrude "ED" 90 LV 125C, 130, 200, 225, 250 Service Manual, P/N 507128, Page 377Get this manual
Circuit Verification, Instrument Harness To make sure the OMC System CheckTM engine monitor can alert the operator during LOW OIL, NO OIL, FUEL RESTRICTION, or engine OVERHEAT condition, it is very important to verify the condition of the sensors and associated wiringTest the engine monitor regularly and anytime you suspect an alert situation has been missed
The instrument harness must be connected to the engine before performing the following testsVerify the condition of all wiring and connectors before proceedinghorn will not sound while in the diagnostic mode
INote The warning
IT] INote Use jumper wires
System Check Gauge