Check
1. Before checking the switches, and if not already done, check the brake light circuit (see Section 6, Steps 8 and 9).
2. The front brake light switch is mounted on the underside of the brake master cylinder. Disconnect the wiring connectors from the switch (see illustration) Using a continuity tester, connect the probes to the terminals of the switch. With the brake lever at rest, there should be no continuity. With the brake lever applied, there should be continuity. If the switch does not behave as described, replace it with a new one.
![](https://motoinstruction.ru/img/honda/19/126045.jpg)
14.2. Front brake switch wiring connectors (arrowed)
3. The rear brake light switch is mounted on the inside of the frame, above the brake pedal and just ahead of the master cylinder (see illustration). Remove the seat and if necessary the right-hand side panel to access the wiring connector (see Chapter 8), Trace the wiring from the switch and disconnect it at the connector. Using a continuity tester, connect the probes to the terminals on the switch side of the wiring connector. With the brake pedal at rest, there should be no continuity. With the brake pedal applied, there should be continuity. If the switch does not behave as described, replace it with a new one, although check first that it is correctly adjusted (see Step 10).
![](https://motoinstruction.ru/img/honda/19/126046.jpg)
14.3. Rear brake light switch (arrowed)
4. If the switches are good, check for voltage at the black wire terminal on the connector with the ignition switch ON - there should be battery voltage. If there's no voltage present, check the wiring between the switch and the ignition switch via the fusebox (see the Wiring Diagrams at the end of this Chapter). II voltage is present, check the green/yellow wire for continuity to the brake light bulb wiring connector, referring to the relevant Wiring Diagram. Repair or renew the wiring as necessary.
Replacement
Front brake lever switch
5. The switch is mounted on the underside of the brake master cylinder. Disconnect the wiring connectors from the switch (see illustration 14.2).
6. Remove the single screw securing the switch to the master cylinder and remove the switch, noting how it fits.
7. Installation is the reverse of removal. The switch isn't adjustable.
Rear brake pedal switch
8. The rear brake light switch is mounted on the inside of the frame, above the brake pedal and just ahead of the master (see illustration 14.3). Remove the seat and il necessary the right-hand side panel to access the wiring connector (see Chapter 8). Trace the wiring from the switch and disconnect it at the connector.
9. Detach the lower end of the switch spring from the brake pedal, then either release the switch with its adjustment nut from the mounting by squeezing the tabs on the underside of the nut, or thread the switch itself out of the nut. leaving the nut in the mounting.
10. Installation is the reverse of removal. Make sure the brake light is activated just before the rear brake pedal takes effect. If adjustment is necessary, hold the switch body and turn the adjustment nut as required (either raising or lowering the switch) until the brake light is activated correctly.