A blown fuse can be identified by a break in its element

element (see illustration).Each fuse is clearly marked with its rating and must only be replaced by a fuse of the correct rating. A spare fuse of each rating is housed in the fusebox, and a spare main fuse is housed in the bottom of the starter relay. If a spare fuse is used, always renew it so that a spare of each rating is carried on the motorcycle at all times.

Warning: Never put in a fuse of a higher rating or bridge the terminals with any other substitute, however temporary it may be. Serious damage may be done to the circuit, or a fire may start.

4 If a fuse blows, be sure to check the wiring circuit very carefully for evidence of a short-circuit. Look for bare wires and chafed, melted or burned insulation. If the fuse is renewed before the cause is located, the new fuse will blow immediately.

5 Occasionally a fuse will blow or cause an open-circuit for no obvious reason. Corrosion of the fuse ends and fusebox terminals may occur and cause poor fuse contact. If this happens, remove the corrosion with a wire brush or wire wool, then spray the fuse end and terminals with electrical contact cleaner.

1 The battery provides power for operation of
the headlight, tail light, brake light and
instrument cluster lights. If none of the lights
operate, always check battery voltage before
proceeding. Low battery voltage indicates
either a faulty battery or a defective charging
system. Refer to Section 3 for battery checks
and Sections 30 and 31 for charging system
tests. Also, check the condition of the fuses.

Headlight

2 If the headlight fails to work, first check the
bulb and bulb terminals (see Section 7) and
then the headlight fuse (see Section 5). If they
are both good, the problem lies in the wiring
or one of the switches in the circuit. Refer to
Section 24 for the switch testing procedures,
and also the wiring diagrams at the end of this
Chapter.

3 German market models and some Northern European market models are fitted with headlight relays for HI (blue wiring) and LO (white wiring) beams (see wiring diagrams). If there appears to be a fault with the headlight but the headlight beams come on when the bulb is connected directly to the battery with jumper wires, the problem could be in one of the relays. To gain access to the relays, first remove the fuel tank (see Chapter 4). The relays are located on brackets on either side of the frame above the carburettors; the LO beam relay is on the left-hand side, the HI beam relay is on the right-hand side.

4 If a relay is suspected of being faulty, the easiest way to determine this is to substitute it with another relay by simply swapping the relays. If the beam in question then works, the faulty relay must be renewed.

5 To test the HI beam relay if another relay is not available for testing purposes, disconnect the relay wiring connector then switch the ignition ON and the light switch ON and turn the HI/LO beam switch to HI. Check for voltage at the wiring connector blue/red terminal. If there is voltage at the terminal, check the wiring between the relay and the headlight. If the wiring is good, renew the relay. If there is no voltage, check the wiring between the connector and the fusebox (see wiring diagrams at the end of this Chapter). Turn the ignition OFF when the check is complete.

6 To test the LO beam relay, disconnect the relay wiring connector then switch the ignition ON and the light switch ON and turn the HI/LO beam switch to LO. Check for voltage at the wiring connector white/red terminal. If there is voltage at the terminal, check the wiring between the relay and the headlight. If the wiring is good, renew the relay. If there is no voltage, check the wiring between the connector and the fusebox (see wiring diagrams at the end of this Chapter). Turn the ignition OFF when the check is complete.

Tail light

7 If the tail light fails to work, first check the
bulb and the bulb terminals (see Section 9),
then the fuse (see Section 5), then check for
voltage at the brown terminal on the supply
side of the tail light wiring connector. If

voltage is present, check the earth (ground) circuit for an open or poor connection.

8 If no voltage is indicated, check the wiring
between the tail light, ignition switch and fuse.
Also check the lighting switch (see Sec­
tion 24).

Brake light

9 If the brake light fails to work, first check
the bulbs and the bulb terminals (see Section
9), then the fuse (see Section 5). Check for
voltage at the green/yellow terminal on the
supply side of the tail light wiring connector,
with the brake lever pulled in or the brake
pedal depressed. If voltage is present, check
the earth (ground) circuit for an open or poor
connection.

10 If no voltage is indicated, check the wiring
between the brake light and the switches,
then check the brake light switches (see
Section 11).

7 Headlight and sidelight bulbs

- test and renewal

Note:The headlight bulb is of the quartz-halogen type. Do not touch the bulb glass as skin acids will shorten the bulb's service life. If the bulb is accidentally touched, it should be wiped carefully when cold with a rag soaked in methylated spirit and dried before fitting. Use a paper towel or dry cloth when handling the bulb.

Warning: Allow the bulb timeto cool before removing it ifthe headlight has just been on.

Headlight bulb - R, T, V, W, X and Y models

1 Unscrew the three headlight rim retaining screws and remove the screws from the headlight shell. Pull the rim and headlight out of the shell, disconnect the wiring connector from the back of the headlight bulb and pull the sidelight bulbholder out of its socket in the headlight (see illustrations).

2To test the bulb, first ensure that the bulb terminals are clean and free of corrosion. Clean the terminals with a knife or wire wool, then use jumper wires to connect the bulb

Electrical system 9»5

7.1c... and pull the sidelight bulb out of its socket

earth (ground) terminal to the battery negative (-ve) terminal, then alternately connect the bulb HI and LO beam terminals to the battery positive (+ve) terminal. If either of the bulb elements fails to illuminate, renew the bulb.

3 Remove the rubber cover from the back of the headlight bulb, noting how it fits (see illustration).

4Release the bulb retaining clip, noting how it fits, then remove the bulb (see illustrations).

5 Fi! the new bulb, bearing in mind the information in the Noteabove. Make sure the tabs on the bulb fit correctly in the slots in the bulb housing, and secure the bulb in position with the retaining clip.

6 Install the rubber cover, making sure it is correctly seated and with the 'TOP' mark at the top. Check that the contacts inside the wiring connector are clean and free from

Date: 2016-01-14; view: 395