Regulator/Rectifier - Check And Replacement - Yamaha TDM850 User Manual

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9»28 Electrical system
33 Regulator/rectifier-
check and replacement
Check
1 Yamaha provide no test specifications for the
regulator/rectifier. If it is suspected of being
faulty, first check all other components and wiring
in the charging circuit, referring to the relevant
Sections in this Chapter and to the wiring
diagrams at the end.
2 If all other components and the wiring are
good, then the regulator/rectifier could be faulty.
Remove the unit (see below) and take it to a
Yamaha dealer for testing.
substitute the suspect unit with a known good
one and see if the fault is cured.
Replacement
3 On 1991 to 1995
regulator/rectifier is mounted on the outside
of the left-hand frame beam (see illustration).
On 1996-on TDM models, it is mounted
behind the fairing. Remove the fairing for
access (see Chapter 8). On 1991 to 1995
33.4a Regulator/rectifier - TRX models
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33.3a Regulator/rectifier -1991 to 1995 TDM
Alternatively,
models, remove the air filter housing for access
to the wiring connector (see Chapter 4) (see
illustration).
TDM models, the
regulator/rectifier is mounted to the underside of
the rear mudguard near the top of the shock
absorber (see illustration). Remove the rider's
seat to access its wiring connector (see Chapter
8) (see illustration).
33.4b Regulator/rectifier wiring connector -
models
4 On TRX models, the
TRX models
33.3b Regulator/rectifier wiring connector -
1991 to 1995 TDM models
5 On XTZ models, the regulator/rectifier is
mounted behind the left-hand side cover (see
illustration). Remove the cover for access (see
Chapter 8).
6 Disconnect the wiring connector.
7 Unscrew the two bolts or nuts securing the
regulator/rectifier and remove it.
8 Install the new unit and tighten its bolts or nuts
securely. Connect the wiring connector.
33.5 Regulator/rectifier - XTZ models
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