Electrical equipment and instruments of motorcycle Honda VTX1800C (2001-2008)
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Service information of lights, meters and switches
General A halogen headlight bulb becomes very hot while the headlight is on, and remains hot for a while after it is turned off. Be sure to let it cool down before servicing. Use an electric heating element to heat the water/coolant mixture for the...
General A halogen headlight bulb becomes very hot while the headlight is on, and remains hot for a while after it is turned off. Be sure to let it cool down before servicing. Use an electric heating element to heat the water/coolant mixture for the...
Troubleshooting of vehicle speed sensor and speedometer
The odometer/trip meter operates normally, but the speedometer does not operate Faulty speedometer. The speedometer operates normally, but the odometer/trip meter does not operate Faulty odometer/trip meter. The speedometer operation is abnormal...
The odometer/trip meter operates normally, but the speedometer does not operate Faulty speedometer. The speedometer operates normally, but the odometer/trip meter does not operate Faulty odometer/trip meter. The speedometer operation is abnormal...
Headlight — bulb replacement
A halogen headlight bulb becomes very hot while the headlight is on, and remains hot for a while after it is turned off. Be sure to let it cool down before servicing. Remove the screws. Remove the headlight from the case. Disconnect the headlight...
A halogen headlight bulb becomes very hot while the headlight is on, and remains hot for a while after it is turned off. Be sure to let it cool down before servicing. Remove the screws. Remove the headlight from the case. Disconnect the headlight...
Headlight case — removal and installation
Remove the headlight (page 19-4). Release the wire clamps and disconnect the connectors. Remove the connectors from the headlight case hole. Remove the bolts and cap nuts. Remove the headlight case. Installation is in the reverse order of removal.
Remove the headlight (page 19-4). Release the wire clamps and disconnect the connectors. Remove the connectors from the headlight case hole. Remove the bolts and cap nuts. Remove the headlight case. Installation is in the reverse order of removal.
Turn signals — bulb replacement
Remove the screw and turn signal lens. While pushing in, turn the bulb counterclockwise to remove it and replace with a new one. Install the bulb in the reverse order of removal. When installing the lens, align the lens groove with the case tab.
Remove the screw and turn signal lens. While pushing in, turn the bulb counterclockwise to remove it and replace with a new one. Install the bulb in the reverse order of removal. When installing the lens, align the lens groove with the case tab.
Front turn signal assembly — removal and installation
Remove the headlight (page 19-4). Disconnect the turn signal connectors. Remove the bolt, holder and turn signal assembly. Installation is in the reverse order of removal. Route the turn signal wire properly (page 1-23).
Remove the headlight (page 19-4). Disconnect the turn signal connectors. Remove the bolt, holder and turn signal assembly. Installation is in the reverse order of removal. Route the turn signal wire properly (page 1-23).
Tail/brake light — bulb replacement
Remove the screws and tail/brake light lens. While pushing in, turn the bulb counterclockwise to remove it and replace with a new one. Install the bulb in the reverse order of removal.
Remove the screws and tail/brake light lens. While pushing in, turn the bulb counterclockwise to remove it and replace with a new one. Install the bulb in the reverse order of removal.
License light — bulb replacement
Remove the nuts, washers, cover and lens. While pushing in, turn the bulb counterclockwise to remove it and replace with a new one. Install the bulb in the reverse order of removal.
Remove the nuts, washers, cover and lens. While pushing in, turn the bulb counterclockwise to remove it and replace with a new one. Install the bulb in the reverse order of removal.
Indicator box — removal and installation
Remove the headlight (page 19-4). Disconnect the indicator box 6P red and 6P brown connectors. Remove the fuel tank cap using the ignition key. Remove the socket bolts and fuel tank cover/indicator box as an assembly. Installation is in the reverse...
Remove the headlight (page 19-4). Disconnect the indicator box 6P red and 6P brown connectors. Remove the fuel tank cap using the ignition key. Remove the socket bolts and fuel tank cover/indicator box as an assembly. Installation is in the reverse...
Speedometer — removal and installation
Remove the headlight (page 19-4). Disconnect the speedometer 6P connector. Remove the upper handlebar holder (page 13-3). Remove the cap nuts, washer and speedometer from the upper handlebar holder. Route the speedometer wire properly (page 1-23)....
Remove the headlight (page 19-4). Disconnect the speedometer 6P connector. Remove the upper handlebar holder (page 13-3). Remove the cap nuts, washer and speedometer from the upper handlebar holder. Route the speedometer wire properly (page 1-23)....
Vehicle speed sensor — voltage inspection
Remove the left rear crankcase cover (page 2-2). Disconnect the vehicle speed sensor 3P connector and check for loose or poor contact of the connector. With the ignition switch turned to "ON", measure the voltage of the vehicle speed sensor 3P...
Remove the left rear crankcase cover (page 2-2). Disconnect the vehicle speed sensor 3P connector and check for loose or poor contact of the connector. With the ignition switch turned to "ON", measure the voltage of the vehicle speed sensor 3P...
Vehicle speed sensor — output signal inspection
With the ignition switch turned to "OFF", check for continuity of the Pink/green wire between the speed sensor 3P connector and speedometer 6P connector. There should be continuity. If there is no continuity, replace and repair the wire harness....
With the ignition switch turned to "OFF", check for continuity of the Pink/green wire between the speed sensor 3P connector and speedometer 6P connector. There should be continuity. If there is no continuity, replace and repair the wire harness....
Vehicle speed sensor — removal and installation
Remove the left rear crankcase cover (page 2-2). Disconnect the vehicle speed sensor 3P connector. Remove the bolts and vehicle speed sensor. Check that the O-ring is in good condition, replace if necessary. Installation is in the reverse order of...
Remove the left rear crankcase cover (page 2-2). Disconnect the vehicle speed sensor 3P connector. Remove the bolts and vehicle speed sensor. Check that the O-ring is in good condition, replace if necessary. Installation is in the reverse order of...
Neutral switch — removal and installation
Inspection Remove the left rear crankcase cover (page 2-2) Disconnect the neutral switch connector. Shift the transmission into neutral and check for continuity between the Light green wire terminal and ground. There should be continuity when the...
Inspection Remove the left rear crankcase cover (page 2-2) Disconnect the neutral switch connector. Shift the transmission into neutral and check for continuity between the Light green wire terminal and ground. There should be continuity when the...
Front brake light switch
Disconnect the front brake light switch wires and check for continuity. There should be continuity with the front brake applied and no continuity with it released.
Disconnect the front brake light switch wires and check for continuity. There should be continuity with the front brake applied and no continuity with it released.
Rear brake light switch
Disconnect the rear brake light switch 2P black connector and check for continuity at the switch side connector terminals. There should be continuity with the rear brake applied and no continuity with it released.
Disconnect the rear brake light switch 2P black connector and check for continuity at the switch side connector terminals. There should be continuity with the rear brake applied and no continuity with it released.
Clutch switch
Disconnect the clutch switch wires and check for continuity. There should be continuity with the clutch lever squeezed and no continuity with it released.
Disconnect the clutch switch wires and check for continuity. There should be continuity with the clutch lever squeezed and no continuity with it released.
Ignition switch — removal and installation
Inspection Remove the seat (page 2-2). Disconnect the ignition switch 4P connector. Check for continuity between the terminals. Continuity should exist between the color coded wires as shown in chart. Removal/installation Remove the seat (page 2-2)....
Inspection Remove the seat (page 2-2). Disconnect the ignition switch 4P connector. Check for continuity between the terminals. Continuity should exist between the color coded wires as shown in chart. Removal/installation Remove the seat (page 2-2)....
Handlebar switch
Remove the headlight (page 19-4). Check for continuity between the terminals. Continuity should exit between the color coded wires in each chart. Left handlebar switch Disconnect the left handlebar 6P blue and 6P black connectors. Horn switch Turn...
Remove the headlight (page 19-4). Check for continuity between the terminals. Continuity should exit between the color coded wires in each chart. Left handlebar switch Disconnect the left handlebar 6P blue and 6P black connectors. Horn switch Turn...
Fan motor switch — removal and installation
Inspection Remove the lower radiator cover (page 6-7). Fan motor does not stop Turn the ignition switch to "OFF", disconnect the connector from the fan motor switch and turn the ignition switch to "ON" again. If the fan motor does not stop, check...
Inspection Remove the lower radiator cover (page 6-7). Fan motor does not stop Turn the ignition switch to "OFF", disconnect the connector from the fan motor switch and turn the ignition switch to "ON" again. If the fan motor does not stop, check...
Coolant temperature indicator
Support the rear end of the fuel tank (page 3-4). Disconnect the ECT/thermo sensor 3P connector from the sensor. Ground the ECT/thermo sensor 3P connector Green/blue terminal with a jumper wire. Turn the ignition switch to "ON" and check the coolant...
Support the rear end of the fuel tank (page 3-4). Disconnect the ECT/thermo sensor 3P connector from the sensor. Ground the ECT/thermo sensor 3P connector Green/blue terminal with a jumper wire. Turn the ignition switch to "ON" and check the coolant...
ECT/thermo sensor unit — inspection
Drain the coolant (page 6-4). Remove the air cleaner housing (page 5-51). Disconnect the 3P connector from the ECT/thermo sensor and remove the sensor. Suspend the ECT/thermo sensor in a pan of coolant (1:1 mixture) on an electric heating element...
Drain the coolant (page 6-4). Remove the air cleaner housing (page 5-51). Disconnect the 3P connector from the ECT/thermo sensor and remove the sensor. Suspend the ECT/thermo sensor in a pan of coolant (1:1 mixture) on an electric heating element...
Side stand switch — removal and installation
Inspection Remove the left rear crankcase cover (page 2-2). Disconnect the side stand switch 2P green connector. Check for continuity at the switch side of the 2P green connector. There should be continuity with the side stand retracted. There...
Inspection Remove the left rear crankcase cover (page 2-2). Disconnect the side stand switch 2P green connector. Check for continuity at the switch side of the 2P green connector. There should be continuity with the side stand retracted. There...
Oil pressure indicator — removal and installation
Inspection Indicator does not come on with the ignition switch turned to "ON" Remove the rubber cap, and disconnect the oil pressure switch wire by removing the terminal screw. Ground the wire terminal to the engine with a jumper wire. Turn the...
Inspection Indicator does not come on with the ignition switch turned to "ON" Remove the rubber cap, and disconnect the oil pressure switch wire by removing the terminal screw. Ground the wire terminal to the engine with a jumper wire. Turn the...
Horn — removal and installation
Inspection Disconnect the wire connectors from the horn. Connect a 12-V battery to the horn terminals. The horn is normal if it sounds when the 12-V battery is connected across the horn terminals. Removal/installation Remove the left step holder...
Inspection Disconnect the wire connectors from the horn. Connect a 12-V battery to the horn terminals. The horn is normal if it sounds when the 12-V battery is connected across the horn terminals. Removal/installation Remove the left step holder...
Turn signal relay — inspection
The turn signal does not blink Remove the right side cover (page 2-2). Remove the turn signal relay from the battery case and disconnect the 3P black connector. Short the Gray and White/green wire terminals of the relay connector with a jumper wire....
The turn signal does not blink Remove the right side cover (page 2-2). Remove the turn signal relay from the battery case and disconnect the 3P black connector. Short the Gray and White/green wire terminals of the relay connector with a jumper wire....
Fuel reserve sensor — inspection
Turn the ignition switch to "ON" and make sure the fuel reserve indicator comes on. If the fuel reserve indicator does not indicate properly, check the following. Open and support the front end of the fuel tank (page 3-4). Disconnect the fuel pump...
Turn the ignition switch to "ON" and make sure the fuel reserve indicator comes on. If the fuel reserve indicator does not indicate properly, check the following. Open and support the front end of the fuel tank (page 3-4). Disconnect the fuel pump...
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- Information for owner
- Control devices
- Operation manual
- Maintenance
- Engine and systems
- Engine repair
- Fuel and control system
- Cooling system
- Lube system
- Transmission
- Running gear and frame
- Frame and hinged elements
- Front suspension and handlebar
- Rear suspension
- Brake system
- Electric equipment
- Equipment and devices
- Ignition system
- Starting and charging system