CHARGING SYSTEM - 4C - 25
90-816462 2-695
CURRENT OUTPUT TEST
Perform this test to check if alternator is capable of
producing rated current output, using a 0-50 amp DC
ammeter.
!
WARNING
Be sure that engine compartment is well-venti-
lated and that there are no gasoline vapors pres-
ent (during the test) to prevent the possibility of
an explosion and/or a fire, should a spark occur.
1. Disconnect negative (–) battery cable from bat-
tery.
2. Disconnect ORANGE lead from alternator output
terminal and connect ammeter in series between
lead and output terminal. Connect positive (+)
side of ammeter toward output terminal.
3. Reconnect negative battery cable.
4. Remove coil wire from distributor cap tower and
ground it to block. Turn on all accessories and
crank engine over with starter motor for 15-20 se-
conds.
5. Turn off accessories and reinstall coil hi-tension
lead. Start engine and adjust engine speed to
1500-2000 RPM. Quickly observe ammeter.
Reading should be at least 30 amps.
6. If reading is low, stop engine and connect a jump-
er wire between alternator output terminal and
regulator terminal. Repeat Steps 4 and 5.
7. If reading is now within specifications, diodes are
faulty. Disassemble alternator and replace rectifi-
er as explained under “Alternator Repair,” follow-
ing, to determine if fault is in regulator or alterna-
tor.
8. If reading is still low with jumper wire connected,
perform “Voltage Output Test,” following, to deter-
mine if fault is in regulator or alternator.
73109
a - Output Wire - ORANGE
b - Ammeter (0-50 Amps)
c - Jumper Lead
d - Regulator Terminal
e - Ground
b
c
d
a
e
Summary of Contents for 13
Page 1: ...13 Printed in U S A 90 816462 2 695 1995 Brunswick Corporation GM 4 Cylinder MARINE ENGINES ...
Page 2: ...90 816462 2 695 0 ...
Page 7: ...1 A IMPORTANT INFORMATION GENERAL INFORMATION 72000 ...
Page 15: ...1 B 50617 IMPORTANT INFORMATION MAINTENANCE ...
Page 36: ...1 C IMPORTANT INFORMATION TROUBLESHOOTING ...
Page 74: ...2 A 50633 REMOVAL AND INSTALLATION 4 CYL ALPHA ONE DRIVE ...
Page 88: ...3 A 26790 ENGINE 181 CID 3 0L 4 CYLINDER GM ENGINE ...
Page 137: ...4 A 72079 ELECTRICAL SYSTEMS STARTING SYSTEM ...
Page 170: ...4 B 71855 ELECTRICAL SYSTEMS IGNITION SYSTEM ...
Page 197: ...ELECTRICAL SYSTEMS CHARGING SYSTEM 4 C 72078 ...
Page 237: ...4 D 72747 ELECTRICAL SYSTEMS INSTRUMENTATION ...
Page 250: ...4 E 72938 ELECTRICAL SYSTEMS WIRING DIAGRAMS ...
Page 264: ...5 A FUEL SYSTEM FUEL PUMP ...
Page 271: ...5 B 72681 FUEL SYSTEM MERCARB 2 BARREL CARBURETOR ...
Page 300: ...6 A 50628 COOLING SYSTEM SEAWATER COOLED MODELS ...
Page 309: ...6 B 73665 COOLING SYSTEM CLOSED COOLING MODELS ...
Page 325: ...C 6 EXHAUST SYSTEM MANIFOLD ...
Page 331: ...7 A 71317 POWER STEERING PUMP ...