Auto Trim Ii Electrical System Troubleshooting; Pump Motor Will Not Run Up Or Down In Either Manual Or Auto Mode - Mercury BRAVO Service Manual

TROUBLESHOOTING
Auto Trim II Electrical System
NOTE:Refer to "Auto Trim II System Wiring Diagram."

Pump Motor Will Not Run UP Or DOWN In Either Manual Or Auto Mode

SOLENOIDS CLICK
Pump positive battery cable
connection loose or corroded.
110 amp fuse blown or loose or
corroded solenoid connection.
Pump motor brushes stuck, corroded
or worn out.
Armature commutator dirty.
Armature faulty.
Field and frame faulty.
Pump gears frozen.
Trim harness shorted between UP
and DOWN circuit.
Page 1C-22
Cause
SERVICE MANUAL NUMBER 28
Special Instructions
Check cable 14.
Check for voltage at terminal 5.
Clean or replace.
Clean or replace.
Test and replace if bad.
Test and replace if bad.
Replace pump.
Disconnect blue-white lead
solenoid terminal. If pump motor will
now run in the DOWN direction, a
short in the harness is indicated.
2 from
90-863160 MAY 2000