A) Disconnect the parking brake sensor connector.
b) Turn on the ignition.
V) Ground the terminal of the connector on the side of the parking brake sensor harness and check that the indicator light is on.
G) Disconnect the low brake fluid sensor connector.
d) Turn on the ignition.
e) Short-circuit the connector leads on the harness side of the low brake fluid level sensor and verify that the light is on.
Diesel vehicles
and) Disconnect the vacuum sensor connector in the vacuum booster system.
h) Turn on the ignition.
And) Ground the connector pin on the wire side of the sensor to "earth" and make sure the indicator is on.