Ford F-150 2001 Workshop Manual page 32

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2001 F-150 Workshop Manual

L5 CHECK BRAKE FLUID LEVEL INDICATOR SWITCH

NOTE: Verify that the brake fluid level is full.

Brake Fluid Level Indicator Switch C162

L6 CHECK CIRCUIT 531 (DG/YE) AND CIRCUIT 512 (TN/LG) FOR SHORT TO GROUND

L7 CHECK CIRCUIT 531 (DG/YE) AND CIRCUIT 512 (TN/LG) FOR AN OPEN

http://www.fordtechservice.dealerconnection.com/pubs/content/~WS11/~MUS~LEN/19/S...

Is the resistance less than 5 ohms between the instrument cluster and parking brake switch, and

greater than 10,000 ohms between the instrument cluster and ground?

Yes

GO to L5.

REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

Measure the resistances between brake fluid level indicator switch pin 1 (component side) and fluid level indicator

switch pin 3 (component side); and between fluid level indicator switch pin 2 (component side) and fluid level

indicator switch pin 3 (component side).

Is the resistance greater than 10,000 ohms between fluid level indicator switch pin 1 and fluid level

indicator switch pin 3, and less than 5 ohms between fluid level indicator switch pin 2 and fluid level

indicator switch pin 3?

Yes

GO to L6.

INSTALL a new brake fluid level switch. TEST the system for normal operation.

If equipped with RABS, disconnect the anti-lock brake control module C222.

Measure the resistances between instrument cluster C236 pin 18, circuit 531 (DG/YE), harness side and ground;

and between instrument cluster C236 pin 19, circuit 512 (TN/LG), harness side and ground.

Are the resistances greater than 10,000 ohms?

Yes

GO to L7.

REPAIR circuit 531 (DG/YE) and circuit 512 (TN/LG) as necessary. TEST the system for normal operation.

Measure the resistances between instrument cluster C236 pin 18, circuit 531 (DG/YE), harness side and brake

fluid level indicator switch C162 pin 3, circuit 531 (DG/YE), harness side; and between instrument cluster C236

pin 19, circuit 512 (TN/LG), harness side and brake fluid level indicator switch C162 pin 2, circuit 512 (TN/LG),

harness side.

Page 32 of 45

5/27/2011