Ford 2003 Mustang Workshop Manual page 519

Is the alignment OK?
A3 CHECK THE DISC BRAKE COMPONENTS
Check all disc brake calipers, anchor plate guide pins and
brake pads for binding, wear, damage, contamination and
correct installation.
Are the disc brake calipers, anchor plate guide pins
and brake pads OK?
A4 ROAD TEST THE VEHICLE
Road test the vehicle, and observe whether the drift
occurs with or without the brakes applied.
Does the drift or pull occur with the brakes applied?
PINPOINT TEST B: THE RED BRAKE WARNING INDICATOR IS
ALWAYS ON
B1 CHECK THE BRAKE MASTER CYLINDER FLUID
LEVEL SWITCH
Key in OFF position.
Disconnect: Brake Master Cylinder Fluid Level Switch
C124.
Connect a fused jumper from C124-2 circuit 977
(PK/WH) to C124-3 circuit 128 (VT/YE).
Test Step
Yes
GO to A4 .
No
REPAIR or INSTALL new
components as necessary.
RETEST for normal
operation.
Yes
REPAIR or INSTALL new
front disc brake caliper or
anchor plate guide pins on
the side opposite to the
direction of the drift or pull.
No
REPAIR or INSTALL new
front disc brake caliper or
anchor plate guide pins on
the side of the vehicle in the
direction of the drift or pull.
Result / Action to Take
Yes
GO to B2 .
No
INSTALL a new brake master