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Mercury 90 - Troubleshooting the Down Circuit; Troubleshooting the Up Circuit

Mercury 90
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90-830234R3 DECEMBER 1997 MID-SECTION - 5B-17
Troubleshooting the “Down” Circuit* (When “Up” Circuit is OK)
*Remote Control Not Equipped with Trailer Button
Battery Voltage Indicated:
Down solenoid is Defective. Re-
place and retest.
No Voltage Indicated:
Connect Voltmeter red lead to Point 4 and
black lead to ground. Depress “Down” trim but-
ton. If battery voltage is indicated, wire is open
between Points 4 and 1.
No Voltage Indicated:
Connect Voltmeter red lead to Point 5. If battery voltage
is indicated, trim switch is faulty. If no battery voltage,
check for loose or corroded connection at Point 5 or open
circuit in wire supplying current to Point 5.
Connect Voltmeter red lead to Point 1 and
black lead to ground.
Depress the “Down” trim button.
Troubleshooting the “Up” Circuit* (When “Down” Circuit Is OK)
*Remote Control NOT Equipped with Trailer Button
Battery Voltage Indicated:
UP Solenoid is defective. Replace
and retest.
No Voltage Indicated:
Connect Voltmeter red lead to Point 7 and
black lead to ground. Depress “Down” trim
button. If battery voltage is indicated, wire is
open between Points 7 and 8.
No Voltage Indicated:
Connect Voltmeter red lead to Point 5. If battery voltage is indi-
cated, trim switch is faulty. If no battery voltage, check for loose
or corroded connection at Point 5 or open circuit in wire supply-
ing current to Point 5.
Connect Voltmeter red lead to Point 8 and
black lead to ground.
Depress the “Up” trim button.

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