Step Test Procedure Test Result
Step 4: Check for
battery voltage at
point 5.
Connect voltmeter red lead to point 5 and
black lead to ground.
Battery voltage measured:
•
Tilt switch is faulty.
No battery voltage measured:
• Check for loose or corroded wire at point 5.
• Open circuit in wire supplying current to point 5.
Step 5: Check for
battery voltage at
point 6.
1. Connect voltmeter red lead to point 6
and black lead to ground.
2. Press the up tilt button.
Battery voltage measured:
• Go to step 6.
No battery voltage measured:
• Relay is defective.
Step 6: Check down
relay.
Test down relay. Refer to Power Tilt
Relay Test, preceding.
Relay is good:
• Pump motor wiring is defective.
• Pump motor is defective.
Relay is faulty:
• Replace relay.
Troubleshooting the Down and Up Circuits (All Circuits Inoperative)
NOTE: Refer to the preceding wiring diagrams for test points when troubleshooting the electrical systems. Test points are
specified by number.
Step Test Procedure Test Result
Step 1: Check
fuse.
Visually inspect power tilt motor fuse.
Fuse blown:
• Correct problem that caused to blow, and
• Replace fuse.
Fuse not blown:
• Go to step 2.
Step 2: Check
battery
voltage.
Connect voltmeter red lead to point 3
and black lead to ground.
No battery voltage:
• Check battery leads for poor connections or open circuit.
• Check battery charge.
Battery voltage measured:
• Go to step 3.
Step 3: Tilt
switch.
1. Connect voltmeter red lead to point
8 and black lead to point 1.
2. Press the tilt down button.
No battery voltage:
• Go to step 4.
Battery voltage measured:
• Check black ground wires for connection or poor ground at
point 10.
• Pump motor is faulty.
Step 4: Open
circuits.
Connect voltmeter red lead to point 5
and black lead to ground.
No voltage measured:
• Go to step 5.
Battery voltage measured:
• Tilt switch is faulty or
• Open circuit in wires (green/white or blue/white) between tilt
buttons and tilt pump motor.
• Check
• Tilt switch.
• All tilt harness connections for loose or corroded connections.
• Pinched or severed wires.
Power Tilt
90-8M0125265 eng NOVEMBER 2017 © 2018 Mercury Marine Page 5B-17
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