Mariner 100, Service Manual, Page: 282 / 391

90-13645--2 495 6B-13 POWER TRIM
Troubleshooting the “Down” and “Up”
Circuits (All Circuits Inoperative)
Battery Voltage Indicated:
No Voltage Indicated:
Battery Voltage Indicated:
Battery Voltage Indicated:
Battery Voltage Indicated:
No Voltage Indicated:
No Voltage Indicated:
No Voltage Indicated:
Blown Fuse: Fuse Not Blown:
Check in-line fuses (under cowl) to
see if fuses are blown.
•
Correct problem that caused fuse
to blow.
•
Replace fuse.
•
Check battery leads and RED leads
(between engine starter motor solenoid
and Point 3) for poor connections or
open circuits.
•
Check battery charge.
•
Connect Voltmeter RED lead to
Point 10.
•
Depress “Up” trim button and
check for battery voltage.
•
Check BLACK ground wires at solenoids
for poor connection or poor ground.
•
Check BLACK motor lead for poor
ground at Point 11. If wire is grounded,
the pump motor is faulty. Refer to “Motor
and Electrical Tests/Repair,” following.
•
Check for open in wire.
•
Check for loose or corroded connections.
•
Check for voltage at any instru-
ment, using a Voltmeter.
•
Turn ignition switch to “Run” position.
•
DO NOT start engine.
•
Check for pinched or severed wires.
•
Check all trim harness connectors for loose
or corroded connections.
•
Check trim switch.
Connect Voltmeter RED lead to
Point 3 and BLACK lead to ground.
Battery voltage should be indicated.
There is an open circuit in wire between
Point 5 and RED lead terminal on the
back of the ignition switch.
RED wire is open between Point 12 and red
terminal on back of the ignition switch.
Check that voltage is being supplied
to control by performing the following
checks:
Connect RED Voltmeter lead to
Point 5, and BLACK lead to ground.
Trim switch is faulty or there is an open circuit
in wires [GREEN-WHITE, BLUE-WHITE AND
PURPLE-WHITE (OR PURPLE)] between trim
buttons and trim pump.