Mercury MERCRUISER Service Manual

DMT 2004 Digital Multimeter 91‑892647A01
A
C O
M
m
A
V
H
z
mV
V
H
z
TEMP
m
A
A
IG
IP
OFF
H
z
TEMP
29366
DMT connections
7. Start the engine and operate at 1300‑1500 RPM. A DMT reading of more than 0.5 volts indicates excessive resistance in
the wiring.
8. Connect the DMT negative (–) lead to the alternator ground terminal. Connect the DMT positive (+) lead to the battery
negative (–) post.
A
C O
M
m
A
V
H
z
mV
V
H
z
TEMP
m
A
A
IG
IP
OFF
H
z
TEMP
29368
DMT connections
9. Start the engine and operate at 1300–1500 RPM. A DMT reading of more than 0.5 volts indicates excessive resistance in
the wiring.
Sensing and Excitation Circuits
Perform the following tests to ensure that all of the circuits between the alternator and the other components within the charging
system are in good condition.
1. Unplug the purple and red/pink connector from the alternator.
2. Connect the positive (+) digital multi‑tester (DMT) lead to the red/pink lead and the negative (–) DMT lead to the ground
terminal.
DMT 2004 Digital Multimeter
91‑892647A01
Charging System
Page 4C-12 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015

Mercury MERCRUISER Specifications

General

Brand	Mercury
Model	MERCRUISER
Category	Engine
Language	English