TROUBLESHOOTING SERVICE MANUAL NUMBER 28
Page 1C-12 90-863160 MAY 2000
Power Trim Electrical System
NOTE:Refer to “Power Trim System Wiring Diagram.”
Power Trim Pump Motor Will Not Run In The OUT/UP Or IN/DOWN Direction
SOLENOIDS DO NOT CLICK
Cause Special Instructions
Bad electrical connection at the 110 amp
fuse or at the battery or the harness came
unplugged from the pump
Check all electrical connection points
20 amp fuse blown.
Determine cause for the blown fuse
and correct before replacing fuse.
NOTE:If fuse blows while trimming OUT/UP
or raising drive unit, problem may be due to
grounded trim limit switch leads. To check
for grounded condition, disconnect trim limit
switch leads at bullet connector 14, 15, 16
and 17. If drive unit can now be raised (using
“Trailer” switch), trim limit switch or leads are
grounded.
Power trim pump battery cables or
wiring harness connections corroded
or loose.
Clean and/or tighten connections 1,
2, 4, 10, 11, 12 and 18 as
necessary.
Trim control wiring harness connector
loose or corroded.
Clean and secure connection 13 as
necessary.
110 amp fuse blown (does not apply to
intermittent problem).
Check for voltage at terminal 4. If no
voltage indicated, determine cause of
blown fuse.
Open circuit in trim control wiring
harness.
Check for battery voltage at terminal
8 while trimming OUT/UP and at
terminal 6 while trimming OUT/UP
If no voltage is indicated, check trim
control for a loose or corroded
connection or a damaged power
supply lead in harness.
Thermal circuit breaker in pump motor
open.
Replace commutator end plate
assembly.
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