Rear Brake Light Switch - MZ 125 SX Repair Manual

Rear Brake
4.3.11 Rear Brake Light Switch
Removal
1. Unscrew the storage tank.
2. Open the cable binder and let the storage tank hang down.
The brake fluid level must be under the level of the main
brake cylinder.
3. Slide back the rubber cap (2).
4. Disconnect the plug contacts.
5. Place cleaning paper around the main brake cylinder to
soak up any brake fluid which may flow out.
6. Unscrew the brake light switch (1), remove the seal
rings (3).
The brake hose must always point upward.
Testing
The brake light switch can only be tested while installed and with
a functional brake system.
Use a voltmeter set to the 20V range for measuring.
1. Switch on the ignition.
The 12V vehicle power supply is on the red/black cable
against the ground.
2. Operate the foot brake lever.
3. Test the voltage on the black cable.
- 12 V: Switch OK.
- 0 V: Voltage: Switch defective, replace.
Installation
Always use new seal rings.
Inspect the seal surfaces on the hose, main brake cylinder and
switch.
Rubber components must be replaced by new parts in case of
damage or cracking or, in general, every
4
years.
1. Screw the brake hose with the brake light switch and new
seal rings onto the main brake cylinder.
2. Connect the plug contacts, slide the rubber cap over.
3. Bleed the brake system.
4. Perform function test.
MZ 125 SXlSM Repair Manual
Tightening torque:
Brake light switch:
05/02
20+ 2
,5
Nm
99