Brake Fluid Level Sensor/Switch: Testing and Inspection

ON-VEHICLE INSPECTION

INSPECT BRAKE FLUID LEVEL WARNING SWITCH

a. Remove the reservoir tank cap and strainer.
b. Disconnect the connector.
c. Measure the resistance between the terminals.

Standard:
Float up (switch off): 10 kOhm or higher

d. Use a syphon, etc. to take fluid out of the reservoir tank.
e. Measure the resistance between the terminals.

Standard:
Float down (switch on): Below 1 Ohm

f. Pour the fluid back in the reservoir tank.