CHARGING SYSTEM
SERVICE MANUAL NUMBER 23
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
connected 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 The 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 1/4 in. 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.
Page 4C-22
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...