Mercury 45 Jet 50-55 - Page 57

2B-14 - ELECTRICAL and IGNITION 90-817643R1 DECEMBER 1996
a. Disconnect black ground wire(s) from Test Point 2.
b. Connect voltmeter between common engine ground and Test Point 2.
c. Turn ignition key to “Start” position.
* Battery Voltage
TEST 2
TEST 3
TEST 4
TEST 5
TEST 6
TEST 7
TEST 8
12 Volt Reading*
12 Volt Reading
12 Volt Reading*
12 Volt Reading*
12 Volt Reading*
12 Volt Reading*
12 Volt Reading*
No voltage reading;
proceed to TEST 3.
No voltage reading;
proceed to TEST 4.
No voltage reading;
proceed to TEST 5.
No voltage reading;
proceed to TEST 6.
a. Reconnect black ground wire(s).
b. Connect voltmeter between common engine ground and Test Point 3.
c. Turn ignition key to “Start” position.
Check black ground wire for poor connection or
open circuit. Reconnect ground wire to starter
solenoid; proceed to TEST 7.
Neutral start switch is open, or yellow/red wire
is open between Test Points 4 and 3.
a. Connect voltmeter between common
engine ground and Test Point 4.
b. Turn ignition key to “Start” position.
Defective starter solenoid.
Connect voltmeter between common
engine ground and Test Point 5.
Defective ignition switch.
Connect voltmeter between common engine ground and Test Point 6.
No voltage reading; check red wire between
battery (+) positive terminal and Test Point 6.
Check fuse in red wire between test points 5 and 6.
Check for open red wire between test points 5 and 6.
a. Connect voltmeter between common engine ground and Test Point 1.
b. Turn ignition key to “Start” position.
No voltage reading; De-
fective starter solenoid.
Should hear solenoid click; proceed to TEST 8.
a. Reconnect black (starter motor) cable to starter solenoid Test Point 1.
b. Connect voltmeter between common engine ground and Test Point 7
c. Turn ignition key to “Start” position.
No voltage reading; check black cable
for poor connection or open circuit.
Check black ground cable at starter for loose
or corroded connection, or open circuit. If
cable is O.K., check starter motor.