Troubleshooting The "Down" Circuit* (When "Up" Circuit Is Ok) - Mercury 45 Jet 50-55 Service Manual

Battery Voltage Indicated:
Connect Voltmeter red lead to
Point 3.
Battery Voltage Indicated:
Connect Voltmeter red lead to
Point 2.
Depress "Down" trim button.
Battery Voltage Indicated:
Pump motor wiring is defective.
Pump motor is defective.
5B-18 - MID-SECTION
Troubleshooting the "Down" Circuit*
(When "Up" Circuit is OK)
*Remote Control Not Equipped with Trailer Button
Connect Voltmeter red lead to
Point 1 and black lead to ground.
Depress the "Down" trim button.
No Voltage Indicated:
There is an open circuit between
Point 3 and positive (+) battery ter-
minal.
Check for loose or corroded con-
nections.
Check wires for open.
No Voltage Indicated:
Relay Switch is defective.
No Voltage Indicated:
Connect Voltmeter red lead to
Point 4 and black lead to ground.
Depress "Down" trim button. If bat-
tery 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 indi-
cated, trim switch is faulty. If no bat-
tery voltage, check for loose or cor-
roded connection at Point 5 or
open circuit in wire supplying cur-
rent to Point 5.
90-817643R1 DECEMBER 1996