Yamaha YZF-R125 Service Manual: Checking the switches

Yamaha YZF-R125 Service Manual / Electrical system / Electrical components / Checking the switches

Checking the switches

1. Clutch switch

2. Main switch

3. Front brake light switch

4. Sidestand switch

5. Rear brake light switch

6. Neutral switch

7. Turn signal switch

8. Horn switch

9. Dimmer switch

10.Pass switch

11.Engine stop switch

12.Start switch

Check each switch for continuity with the pocket tester. If the continuity reading is incorrect, check the wiring connections and, if necessary, replace the switch.

CAUTION:

Never insert the tester probes into the coupler terminal slots "a". Always insert the probes from the opposite end of the coupler, taking care not to loosen or damage the leads.

NOTE:

Before checking for continuity, set the pocket tester to "0" and to the " × 1" range.
When checking for continuity, switch back and forth between the switch positions a few times.

Checking the switches

The switches and their terminal connections are illustrated as in the following example of the main switch.

The switch positions "a" are shown in the far left column and the switch lead colors "b" are shown in the top row.

The continuity (i. e., a closed circuit) between switch terminals at a given switch position is indicated by " ". There is continuity between
red and brown/blue, and blue/yellow and blue/black when the switch is set to "ON".

Electrical components

1. Main switch 2. Clutch switch 3. Front brake light switch 4. Ignition coil 5. Throttle body sensor assembly (intake air pressure sensor, intake air temperature sensor, throttle position se ...

Checking the bulbs and bulb sockets

NOTE: Do not check any of the lights that use LEDs. Check each bulb and bulb socket for damage or wear, proper connections, and also for continuity between the terminals. Damage/wear Repa ...

Other materials:

Installing the front wheel (disc)
1. Install: Front brake disc NOTE: Be sure to install the front brake disc with the arrow mark "a" on the disc facing out. Tighten the brake disc bolts in stages and in a crisscross pattern. 2. Check: Front brake disc Refer to "CHECKING THE FRONT BRAKE DISC" on page 4 ...

Periodic maintenance and adjustment
Periodic inspection, adjustment, and lubrication will keep your vehicle in the safest and most efficient condition possible. Safety is an obligation of the vehicle owner/operator. The most important points of vehicle inspection, adjustment, and lubrication are explained on the followin ...

Checking the coolant temperature sensor
1. Remove: Coolant temperature sensor WARNING Handle the coolant temperature sensor with special care. Never subject the coolant temperature sensor to strong shocks. If the coolant temperature sensor is dropped, replace it. 2. Check: Coolant temper ...