Brake Light Switches - Check And Replacement; Circuit Check; Switch Replacement; Front Brake Lever Switch - Yamaha TDM850 User Manual

9*10 Electrical system
13.1f Rear turn signal wiring connectors -
XTZ models
2 On TDM and XTZ models, pull back the
rubber boot and unscrew the nut securing the
turn signal (see illustration). Remove the
assembly, taking care not to snag the wiring.
3 On TRX models, remove the screw or nut
securing the assembly to either the inside of the
fairing or rear mudguard (see illustration).
Remove the mounting plate, noting how it fits,
and withdraw the turn signal, taking care not to
snag the wiring.
Installation
4 Installation is the reverse of removal. Check
the operation of the turn signals.
14 Brake light switches -
check and replacement

Circuit check

1 Before checking any electrical circuit, check
the bulbs (see Section 9) and fuses (see Section
5).
2 On XTZ models, remove the fuel tank to
access the front brake switch wiring connector
(see Chapter 4). On all models, remove the seat
to access the rear brake switch connector (see
Chapter 8).
3 Using a multimeter or test light connected to a
good earth, check for voltage at the brake light
switch brown or black/red
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14.7b Front brake switch wiring
connectors (A), mounting screw (B) -
TRX models
13.2a Front turn signal mounting nut
(arrowed) - TDM models
13.3 Front turn signal mounting screw and
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plate - TRX models
wire (as applicable) connector with the ignition
ON (connector halves remain joined). If there's
no voltage present, check the wire between the
switch and the ignition switch (see the wiring
diagrams at the end of this Chapter).
4 If voltage is available, touch the probe of the
test light to the other terminal of the switch, then
pull the brake lever in or depress the brake
pedal. If no reading is obtained or the test light
doesn't light up, renew the switch.
5 If a reading is obtained or the test light does
light up, check the wiring between the switch and
the brake light bulb (see the wiring diagrams at
the end of this Chapter).
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14.7c Front brake switch wiring connector
(arrowed) - XTZ models
13.2b Rear turn signal mounting nut
(arrowed) - XTZ models
14.7a Front brake switch wiring connector
(arrowed) - TDM models

Switch replacement

Front brake lever switch

6 The switch is mounted on the underside of the
brake lever bracket on TDM and TRX models,
and is a push-fit into the bracket on XTZ models.
On XTZ models remove the fuel tank to access
the wiring connector.
7 Disconnect the wiring connector(s), then either
remove the screws and detach the switch or
withdraw the switch from the bracket, according
to model (see illustrations). On XTZ models,
free the wiring from any clips or ties.
8 Installation is the reverse of removal. The
switch isn't adjustable.
14.7d Front brake switch screws
(arrowed) - TDM models
Scaned by Stalker