2004 YAMAHA TT600RE Service Manual

ELECLIGHT SYSTEM
7-41
467C4B5CAMP403D494A4856 172320-2
GWLY
BB
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B
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Or
B
LW
MAIN HARNESSB
B
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BrB
12V10WB
B
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12V10WB
B
187
BY
B
R
B
BrL
WWB
OFF
BrL
W
B
W
BB
B
B BLB
BBrB
G
B
BrB
Br
OFF
B
EXT. CORD
Br
GY
BL
G
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GYB
B
L
GB
BrB
LR
LR Sb
B
RW
-
LR
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BrB
YBrBrB
YBrGB
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Ch
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BrB
HIGH
TURN
NEU.ILL.
B
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BrL
LBBY
LY LB
LY
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205
B
RBL
BrL
Br
PARKOFFON
ON
ON
Sb
L
GB
GY

G
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LYBY
RUN
LW
B
B
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BY
LBrRR
LWRB
GB
R
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BrBrW
WB
Br
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Sb
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(BLUE)B
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BrB
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Br
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MAIN HARNESS
AHEAD LIGHT
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11
12
13
14
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LIGHT SYSTEM - CIRCUIT DIAGRAM
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LIGHT SYSTEM
7-42
ELEC
The diagram shows the light system circuit inside the electric system of the motorcycle. NOTE:
For the colour codes and complete legend, see page 7-2.
(3) Battery
(6) Fuse
(7) Main switch
(18) Left handlebar switch
(20) Diode
(21) Pass switch
3631
222118
26
28
20
$
&
(22) Dimmer switch
(26) Headlight
(28) Relay assy
(31) Tail/stop light
(32) Meter
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ELECLIGHT SYSTEM
7-43
DIAGNOSTICS THE HIGH BEAM LIGHT, PARKING INDICATOR LIGHT, REAR LIGHT, FRONT PARKING LIGHT AND/OR INSTRUMENT LIGHTS FAIL TO TURN ON.
Procedure
Inspect:
1. Fuse
2. Battery
3. Main switch 4. Dipped/high beam light and dimmer switch
5. Relay assy
6. Harness connections (full system of connec- tions)
NOTE:
•Before starting inspections, remove the following parts:
1. Seat
2. Rear cowling
3. Cowling (headlight)
4. Tail light cover
•To check for defects use the following special tools.
Pocket tester: P/N. 90890-03112
1. Fuse
•Check the fuse for continuity.
Refer to “CHECKING THE FUSES” in
Chapter 3.
•Is the fuse OK?
YES
2. Battery
•Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in Chapter 3.
Min. open-circuit voltage:
12.8 V or more at 20°C (68°F)
•Is the battery OK?
NO
Replace the fuse.
NO
•Clean the battery terminals.
•Recharge or replace the battery.
YES
*
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LIGHT SYSTEM
7-44
ELEC
3. Main switch.
•Disconnect the main switch connector
from the wire harness.
•Connect the pocket tester ( Ωx 1) to the
switch cables.
Refer to “SWITCH CHECK” in CHAPTER
3.
CORRECT
INCORRECT
The main switch is defective. Replace.










*
4. Dipped/high beam commutator and dim-
mer switch.
•Disconnect the left handlebar switch con-
nector from the wire harness.
•Connect the pocket tester ( Ωx 1) to the
left handlebar switch terminals.
•Check the switch component for conti-
nuity between “Brown (1)” and “Yellow
(2)”, “Brown/Blue (3)” and “Green (4)”,
“Brown/Blue (3)” and “Yellow (2)”.
Refer to “SWITCH CHECK” in CHAPTER
3.
INCORRECT
The dipped/high beam commutator and/or the
dimmer switch are defective. Replace the left
handlebar switch.
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CORRECT
*
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ELECLIGHT SYSTEM
7-45
*
CORRECT
DEFECTIVE CONNECTIONS Repair.6. Harness connections.
•Check the connections of the entire light
system.
Check the conditions of each circuit for the
entire light system.
See the “ELECTRIC CIRCUIT DIAGRAM”.
5. Starter circuit cut-off relay.
•Connect the pocket tester (DC 20V) and
the battery (12V) to the cut-off relay con-
nector terminal of the starter circuit.
Battery terminal (+) ➔
White/Black terminal (1)
Battery terminal (–) ➔Black terminal (2)
Tester terminal (+) ➔Brown terminal (3)
Tester terminal (–) ➔Earth
DISCONTINUITY
The starter circuit cut-off relay is defective.
Replace.
•Turn the main switch to ON.
•Check the voltage (12V) on the
“Brown/Blue” and “Brown” cable to the
connector terminal of the starter circuit
cut-off relay.
IN COMPLIANCE WITH
SPECIFICATIONS (12V)
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LIGHT SYSTEM
7-46
ELEC
LIGHT SYSTEM INSPECTION NOTE:
To proceed to the control of the light system, start the engine and then stop it by the emergency engine
stop switch. In this way the light relay remains excited and it is possible to check the light system.
1. The front headlight and the high beam light fail to turn on.
CONTINUITY
DISCONTINUITY
Replace the bulb and/or the bulbholder.1. Bulb and bulbholder.
•Check the continuity of the bulb and bulb-
holder.
Refer to “BULB INSPECTION” section.
2. Voltage.
•Connect the pocket tester (DC 20V) to the
front headlight connectors and the high
beam switch.
Headlight: Tester terminal (+) ➔
Green (2) or Yellow (1) cable
Tester terminal (–) ➔Black cable (3)
High beam light: Tester terminal (+) ➔Yellow cable (4)
Tester terminal (–) ➔Black cable (5)
[A] When the lights switch (commutator) is at
position “HI”.
[B] When the lights switch (commutator) is at position “LO”.
OUT OF SPECIFICATION
The circuit from the main switch to the bulbhol-
der connector is defective. Repair.
A
B
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ELECLIGHT SYSTEM
7-47
CONTINUITY
DISCONTINUITY Replace the bulb and/or the bulbholder.1. Bulb and bulbholder.
•Check the continuity of the bulb and bulb-
holder.
Refer to “BULB INSPECTION” section.
2. Voltage.
•Connect the pocket tester (DC 20V) to the
bulbholder connector.
Tester terminal (+) ➔Blue cable (1)
Tester terminal (–) ➔Black cable (2)
•Turn the main switch to ON.
•Check the voltage (12V) on the “Blue”
cable of the bulbholder connector.
OUT OF SPECIFICATION
The circuit from the main switch to the bulbhol-
der connector is defective. Repair.
IN COMPLIANCE WITH
SPECIFICATIONS (12V)
•Turn the main switch to ON.
•Turn the lights switch to “LO” or “HI”.
•Check the voltage (12V) on the “Green”
and “Yellow” cable at the bulbholder ter-
minals.
The circuit is efficient.
IN COMPLIANCE WITH
SPECIFICATIONS (12V)
The circuit is efficient.
2. The instrument light and/or the parking indica- tor light fails to turn on.
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LIGHT SYSTEM
7-48
ELEC
CONTINUITY
DISCONTINUITY Replace the bulb and/or bulbholder.
1. Bulb and bulbholder.
•Check the continuity of the bulb and bulb-
holder.
Refer to “BULB INSPECTION” section.
2. Voltage.
•Connect the pocket tester (DC 20V) to the
bulbholder connector.
Tester terminal (+) ➔Blue terminal (1)
Tester terminal (–) ➔Black terminal (2)
•Turn the main switch to ON.
•Check the voltage (12V) on the “Blue”
cable of the bulbholder connector.
OUT OF SPECIFICATION
The circuit from the main switch to the bulbhol-
der connector is defective. Repair.
IN COMPLIANCE WITH
SPECIFICATIONS (12V)
The circuit is efficient.
3. The parking light fails to turn on.
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