Additionally, a low brake fluid level is indicated: the fluid level is monitored by a float with a connected contact located in the expansion tank. If the level drops as a result of a leak in the brake system, contact is made with the ground wire, and the control lamp lights up.
Troubleshooting
The light does not come on when the handbrake is applied: remove the light bulb and check.
If this does not bring success, remove the handbrake cover and expose the switch, see chapter "Salon".
Disconnect the wire connector at the switch and place the connector on bare metal.
If the light now lights up, the switch is faulty.
The light does not go out when the handbrake is off: disconnect the wire on the handbrake as described above, but hang the connector in the air.
If the light no longer lights up, then the switch was faulty.
On the contrary, if it continues to burn, then the wire has worn out and shorted to ground.
The light comes on when the handbrake is off and the engine is running: check the brake fluid level in the expansion tank.
If the expansion tank is full, disconnect the wire connector on the tank cap.
If the light now goes out, then the liquid level switch is faulty.
It is also possible that the float is broken.
If the indicator light continues to light, then the defect is in the device, or in the power supply wire, or in the handbrake lever contact switch, or in its wire.
(Material published on the website: «OpelBook»)
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