1996 Johnson Evinrude "ED" 40 thru 55 2-Cylinder Service Manual, P/N 507124, Page 297Get this manual
Circuit Verification, Instrument Harness To make sure the OVIC 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 missedINotel The instrument harness must be connected to the engine before performing the following testsVerify the condition of all wiring and connectors before proceedingI Note The warning horn will not sound while in the diagnostic mode
I Note Use jumper wires made with the appropriate terminals to test the warning circuits