Power Trim Electrical System Troubleshooting; Power Trim Pump Motor Will Not Run In The Out/Up Or In/Down Direction; Solenoids Do Not Click - Mercury BRAVO Service Manual

TROUBLESHOOTING
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

Bad electrical connection at the 110 amp
fuse or at the battery or the harness came
unplugged from the pump
20 amp fuse blown.
Power trim pump battery cables or
wiring harness connections corroded
or loose.
Trim control wiring harness connector
loose or corroded.
110 amp fuse blown (does not apply to
intermittent problem).
Open circuit in trim control wiring
harness.
Thermal circuit breaker in pump motor
open.
Page 1C-12
Cause
SERVICE MANUAL NUMBER 28
Special Instructions
Check all electrical connection points
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,
and 17. If drive unit can now be raised (using
"Trailer" switch), trim limit switch or leads are
grounded.
Clean and/or tighten connections 1,
2, 4, 10, 11, 12 and 18
necessary.
Clean and secure connection
necessary.
Check for voltage at terminal 4. If no
voltage indicated, determine cause of
blown fuse.
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.
Replace commutator end plate
assembly.
16
as
13 as
90-863160 MAY 2000