LOW OIL Circuit Test
Turn the key switch ON. Using a jumper wire, con nect tan/black wire (pin 4) of the engine harness connector to a clean engine ground. The LOW OIL light should turn on after 40 seconds.
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If the LOW OIL light does not turn on after connecting the terminal to ground, test circuit for continuity.
Turn the key switch OFF and reconnect all disconnected circuits.
NO OIL Circuit
Separate the 6-pin System Check connector of MWS instrument harness from engine harness. Black wire (pin 3) must be grounded.
Using a jumper wire, connect tan/yellow wire (pin 5) to a clean engine ground.
Turn the key switch ON. After the normal self-test sequence, the NO OIL light should stay
• If the NO OIL light is not on, test circuit for continuity. Test for continuity of the MWS instrument harness (tan/yellow wire).
• Test for continuity of the engine wire harness between terminal 5 (tan/yellow wire) of the System Check connector and pin 24 of the EMM J1- A connector.
Turn the key switch OFF and reconnect all disconnected circuits.
TACHOMETER CIRCUIT TESTS
Check voltage at the battery. Use this reading as a reference for battery voltage.
- Purple lead 004287
- Black lead
- Gray lead
Connect the red meter lead to the tachometer purple wire and the black meter lead to the tachometer black wire (key ON, outboard NOT running).
• If meter shows battery voltage, go to next step.
• If meter shows less than battery voltage, check the purple, red/purple, and black wiring circuits; fuse, key switch, and battery connections.
Disconnect gray and black wires at tachometer. Set Fluke 29 Series II meter, or equivalent, to Hz scale. Connect meter between gray wire and black wire. With outboard running at 1000 RPM, meter should indicate 90 to 105 Hz.
• If meter reads 90 to 105 Hz, replace tachometer.
• If meter reads low or no signal, confirm output on gray wire at pin 16 of EMM J1-A connector. Reading OK Check condition of tachometer circuit (gray wire). Repair as needed. Reading not OK – Check connection at EMM; replace faulty EMM.
