SERVICE MANUAL NUMBER 26
CHARGING SYSTEM
RECTIFIER AND DIODE ASSEMBLY
NOTE: Failure of any component in tests following will require replacement of entire rectifier
assembly.
NEGATIVE (–) RECTIFIER
IMPORTANT: Rectifier MUST BE disconnected from stator for this test.
CAUTION
DO NOT use a test instrument with more than a 12 volt source (in the following test),
as rectifier may be damaged.
1.
Connect one lead of an ohmmeter (set on R x1 scale) to negative (–) rectifier heat sink
and the other lead to one of the rectifier terminals. Note the reading.
2.
3.
Reverse leads and again note reading.
Meter should indicate a high or infinite resistance (no meter movement) when con-
nected one way and a low reading when connected the other. If both readings are high
or infinite, rectifier is open. If both readings are low, rectifier is shorted.
4.
5.
Repeat Steps 1 through 3 for two other rectifiers in heat sink.
Replace assembly if any of the rectifiers is shorted or open.
b
c
72147
a
a - Heat Sink
b - Rectifier Terminal
c - Test These Two Rectifiers in Same Manner
POSITIVE (+) RECTIFIER AND DIODES
CAUTION
DO NOT use a test instrument with more than a 12 volt source (in the following test),
as rectifier may be damaged.
1.
Connect one lead of an ohmmeter (set on R x1 scale) to 1/4in. stud on positive (+)
rectifier heat sink and the other lead to one of the rectifier terminals. Note the meter
reading.
2.
Reverse leads and again note reading.
INDEX
90-861329--1
MARCH 1999
Page 4C-21
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 181 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(6 votes, average: 5 out of 5)
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