Honda NX 250 Service Manual 19
19. LIGHTS/METERS/SWITCHES
SERVICE INFORMATION
TROUBLESHOOTING
HEADLIGHT
INSTRUMENT CASE
TURN SIGNAL/TAIL LIGHT BULB
NEUTRAL SWITCH
FRONT BRAKE LIGHT SWITCH
19-1
19-2
19-3
19-4
19-5
19-5
19-6
REAR BRAKE LIGHT SWITCH
CLUTCH SWITCH
HANDLEBAR SWITCH
HORN
IGNITION SWITCH
THERMOSTATIC SWITCH
TEMPERATURE SENSOR
19-6
19-6
19-7
19-7
19-8
19-9
19-9
SERVICE INFORMATION
GENERAL
• Some wires have different colored bands around them near the connector. These are connected to other wires which have
the same color band.
• All plastic connectors have locking tabs that must be released before disconnecting, and must be aligned when
reconnecting.
• The following color codes used are indicated throughout this section and on the wiring diagram.
Bu = Blue
Bl = Black
Br = Brown
G = Green
Gr = Grey
Lb = Light Blue
Lg = Light Green
О = Orange
P = Pink
R = Red
W = White
Y = Yellow
To isolate an electrical failure, check the continuity of the electrical path through the part, A continuity check can usually
be made without removing the part from the motorcycle. Simply disconnect the wires and connect a continuity tester or
volt-ohmmeter to the terminals or connections.
A continuity tester is useful when checking to find out whether or not there is an electrical connection between the two
points. An ohmmeter is needed to measure the resistance of a circuit, such as when there is a specific coil resistance involved, or when checking for high resistance caused by corroded connections.
TORQUE VALUES
Thermostatic switch
Ignition switch screw
Temperature sensor
TOOLS
Digital Muititester
or
Circuit tester (SANWA)
or
Circuit tester (KOWA)
18N-m<1.8kg-m, 13 ft-lb)
7 N-m (0.7 kg-m, 5 ft-lb)
10N-m (1.0 kg-m, 7 ft-lb) Apply sealant to the threads
07411 -0020000 or KS-AHM-32-003 (U.S.A. only)
07308-0020000
TH-5H
19-1
LIGHTS/METERS/SWITCHES
TROUBLESHOOTING
TEMPERATURE WARNING SYSTEM
If the temperature warning light does not come on:
Disconnect the wires from the temperature sensor and short together the G/Bu and ground wires with a jumper wire.
— Check the warning light with ignition switch ON.
LIGHT DOES NOT COME ON
Measure the voltage between the G/Bu wire and ground
NO VOLTAGE LOW VOLTAGE
Disconnect the temperature unit 2P connector and the G/Bu wire
from the meter and measure the voltage between the Bl (2P connector) and G/Bu wire with ground.
NO VOLTAGE LOW VOLTAGE
LIGHT COMES ON
(1) WARNING INDICATOR
(2) TEMPERATURE
UNIT
-•-Faulty temperature sensor
Faulty temperature unit
Faulty temperature unit
• Open circuit in the wire harness between the 2P
connector and temperature sensor.
(9) THERMOSTATIC
SWITCH
(6) FAN MOTOR
19-2
10 A
18) SUB FUSE
(3) TEMPERATURE
SENSOR
(7) MAIN
"#• FUSE
(5) IGNITION
SWITCH
R: Red
Bl: Black
Bu; Blue
O: Orange
G: Green
(4) BATTERY
HEADLIGHT
CAUTION
• Do not leave fingerprints on the bulb; they may create hot
spots. Wear clean gloves when installing the halogen bulb. If
you do touch the bulb with bare hands, clean it with an alcohol-
moistened cloth before installing it in the case.
BULB REPLACEMENT
Remove the dust cover.
Remove the retainer clip and headlight bulb.
LIGHTS/METERS/SWITCHES
CASE REMOVAL
Remove the inner covers and the front fairing.
Disconnect the headlight connectors.
Remove the headlight mounting bolts and headlight.
(2) RETAINER CLIP
(2) INNER COVER
~
HEADLIGHT MOUNTING BOLT
19-3
Loading...