2003 FORD MUSTANG Workshop Manual

immobilizer coolant level radio diagnostic menu fuse box location jump start terminals

Page 513 of 4378

FORD MUSTANG 2003 Workshop Manual DIAGNOSIS AND TESTING
Brake System
Refer to Wiring Diagrams Cell
60 , Instrument Cluster for schematic and connector information.
Refer to Wiring Diagrams Cell 97 , Daytime Running Lamps for sc

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FORD MUSTANG 2003 Workshop Manual in the brake master cylinder reservoir are also indicators of system concerns.
If a wheel is locked and the vehicle must be moved, open a bleeder screw at the locked wheel (1007)
to let out enough f

in the brake master cylinder reservoir are also indicators of system concerns.
If a wheel is locked and the vehicle must be moved, open a bleeder screw at the locked wheel (1007)
to let out enough fluid to relieve the pressure. Close the bleeder screw. This bleeding operation may
release the brakes but will not correct the cause of trouble. If this does not relieve the locked wheel
condition, repair the locked components before proceeding.
Inspect all hoses and connections. All unused vacuum connectors should be capped. Make sure
hoses and their connections are correctly secured and in good condition with no holes, soft or
collapsed areas.
Non-
Pressure Leaks
The only part of the brake system that could have a brake fluid loss that does not appear when the
system is under pressure is the brake master cylinder reservoir area. Brake fluid loss can be caused
by a missing or poorly- fitted brake master cylinder filler cap (2162), a punctured or otherwise damaged
brake master cylinder reservoir, a missing or damaged brake master cylinder filler cap gasket, or by
missing, damaged or poorly- fitted sealing grommets between the brake master cylinder (2140) and the
brake master cylinder reservoir.
The brake master cylinder reservoir grommets are not separately serviceable and must be installed
new as part of a new brake master cylinder reservoir.
Install a new flexible brake hose if it shows signs of softening, cracking or other damage.
When installing a new brake hose, position the hose to avoid contact with other vehicle components.
Road Test
Perform a road test to compare actual vehicle braking performance with the performance standards
expected by the driver. The ability of the test driver to make valid comparisons and detect performance
deficiencies will depend on experience.
The driver should have a thorough knowledge of brake system operation and accepted general
performance guidelines in order to make good comparisons and detect performance problems.
Select a road that is reasonably smooth and level. Gravel or bumpy roads are not suitable because the
surface does not allow the tires to grip the road equally. Avoid crowned roads.
A key factor in evaluating brake concerns is the deceleration rate. This varies from vehicle to vehicle
and with changes in operating conditions. It is evident how well the brakes are working after just a few
applications.
Avoid locking the brakes. Locked brakes are not an indication of braking efficiency.
Visual Inspection Chart Mechanical Electrical
z
Brake master cylinder
z Brake caliper piston
z Brake discs
z Brake pads z
Parking brake switch
z Damaged or corroded wiring harness
z Brake master cylinder fluid level switch Klj . 2 ba
152003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

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FORD MUSTANG 2003 Workshop Manual For low or spongy brake pedal concerns:
�zcheck and, if necessary, refill the brake master cylinder reservoir.
�z bleed the brake system and retest the brake pedal feel.
�z if the brake pedal is st

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FORD MUSTANG 2003 Workshop Manual not machine a new brake disc.
7. For vehicles with a two- piece hub and brake disc assembly:
�z Match-mark before disassembly.
�z Remove the brake disc.
�z Using a die grinder with a mild abrasive

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FORD MUSTANG 2003 Workshop Manual Always On
�zParking brake.
�z Brake fluid level.
�z Vibration When
Brakes Are Applied �z
Rear disc brakes.
�z Front disc brakes. �z
REFER to Section 100 -
04 .
�z Brake Pedal Goes
Down Fast

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FORD MUSTANG 2003 Workshop Manual Pinpoint Tests
PINPOINT TEST A: THE BRAKES PULL OR DRIFT booster hose as
necessary.
�z Red Brake Warning
Indicator Inoperative �z
Circuit.
�z Bulb. �z
REFER to Section 413 -
01 .
�z Brake N

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FORD MUSTANG 2003 Workshop Manual PINPOINT TEST B: THE RED BRAKE WARNING INDICATOR IS
ALWAYS ON �z
Is the alignment OK? A3 CHECK THE DISC BRAKE COMPONENTS
�z
Check all disc brake calipers, anchor plate guide pins and
brake pads f

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FORD MUSTANG 2003 Workshop Manual �z
Key in ON position.
�z Does the brake warning indicator stay on? cylinder reservoir. TEST the
system for normal operation.
B2 CHECK PARKING BRAKE SWITCH
�z
Key in OFF position.
�z Disconnect:

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