2003 FORD MUSTANG warning

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: Parking Brake Switch.
z Key in ON position.
z Does the brake warning light stay on? Yes
GO to
B3 .
No
INSTALL a new parking brake
switch. TEST the system for
normal operation. B3 CHECK THE GEM
z
Key in OFF position.
z Disconnect: GEM C201e.
z Measure resistance to ground at C201e- 13.
z Is the resistance greater than 10,000 ohms? Yes
REPAIR the GEM. TEST the
system for normal operation.
No
For vehicles without Daytime
Running Lights (DRL), GO to
B4
. For vehicles with DRL, GO
to B5 .
B4 CHECK CIRCUITS 977 (VT/WH), 22 (LB/BK) AND 128
(VT/YE) z
Remove the fused jumper from C124.
z Measure the resistance to ground at C124- 2.
z Is the resistance greater than 10,000 ohms? Yes
REPAIR the ground short in
circuit 128 (VT/YE). TEST the
system for normal operation.
No
REPAIR the ground short in
circuit 977 (VT/WH) or circuit 22
(LB/BK). TEST the system for
normal operation.
B5 CHECK CIRCUIT 128 (VT/YE)
z
Remove the fused jumper from C124.
z Measure the resistance to ground at C201e- 13. Yes
GO to
B6 . Klj . 8 ba
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GENERAL PROCEDURES
Bleeding —
Components
Master Cylinder Priming — In-Vehicle or Bench
WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with
eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes with
running water for 15 minutes. Get medical attention if irritation persists. If taken internally,
drink water and induce vomiting. Get medical attention immediately.
CAUTION: Do not allow the brake master cylinder reservoir to run dry during the bleeding
operation. Keep the brake master cylinder reservoir filled with the specified brake fluid. Never
reuse the brake fluid that has been drained from the hydraulic system.
CAUTION: Brake fluid is harmful to painted and plastic surfaces. If brake fluid is spilled
onto a painted or plastic surface, immediately wash it with water.
NOTE: When any part of the hydraulic system has been disconnected for repair or installation of new
components, air can enter the system and cause spongy brake pedal (2455) action. This requires
bleeding of the hydraulic system after it has been correctly connected. The hydraulic system can be
bled manually or with pressure bleeding equipment.
NOTE: When a new brake master cylinder (2140) has been installed or the system has been emptied,
or partially emptied, it should be primed to prevent air from entering the system.
1. For in- vehicle priming, disconnect the brake lines.
SECTION 206-
00: Brake System — General Information 2003 Mustang Workshop Manual Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-
F224,
New Generation STAR (NGS)
Tester
418- F052, or equivalent scan
tool NGS Flash Cable
418-
F120 (007- 00531) or
Equivalent Klj . 1 ba
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GENERAL PROCEDURES
Bleeding —
System
Manual
WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with
eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes with
running water for 15 minutes. Get medical attention if irritation persists. If taken internally,
drink water and induce vomiting. Get medical attention immediately.
CAUTION: Do not allow the brake master cylinder reservoir to run dry during the bleeding
operation. Keep the brake master cylinder reservoir filled with the specified brake fluid. Never
reuse the brake fluid that has been drained from the hydraulic system.
CAUTION: Brake fluid is harmful to painted and plastic surfaces. If brake fluid is spilled
onto a painted or plastic surface, immediately wash it with water.
NOTE: When any part of the hydraulic system has been disconnected for repair or installation of new
components, air can get into the system and cause spongy brake pedal action. This requires bleeding
of the hydraulic system after it has been correctly connected. The hydraulic system can be bled
manually or with pressure bleeding equipment.
1. Clean all dirt from and remove the brake master cylinder filler cap and fill the brake master cylinder reservoir with the specified brake fluid.
2. Place a box end wrench on the RH rear bleeder screw. Attach a rubber drain tube to the RH rear bleeder screw and submerge the free end of the tube in a container partially filled with
clean brake fluid.
SECTION 206-
00: Brake System — General Information 2003 Mustang Workshop Manual Klj . 1 ba
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REMOVAL AND INSTALLATION
Caliper
Removal
1. Raise and support the vehicle. For additional information, refer to Section 100 - 02 .
2. Remove the wheel and tire assembly. For additional information, refer to Section 204 - 04 .
3. WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact
with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes
with running water for 15 minutes, get medical attention if irritation persists. If taken
internally, drink water and induce vomiting. Get medical attention immediately.
CAUTION: Brake fluid is harmful to painted and plastic surfaces. If brake fluid is
spilled onto a painted or plastic surface, wash it with water immediately.
Disconnect the front brake hose (2078). 1. Remove the front brake flow bolt.
2. Disconnect the front brake hose.
3. Remove and discard the copper washers. Plug the front brake hose.
4. Remove the caliper bolts. 1. Hold the guide pins stationary.
2. Remove the caliper bolts.
SECTION 206-
03: Front Disc Brake 2003 Mustang Workshop Manual Klj . 1 ba
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DESCRIPTION AND OPERATION
Rear Disc Brake
WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with
eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes with
running water for 15 minutes. Get medical attention if irritation persists. If taken internally,
drink water and induce vomiting. Get medical attention immediately.
The rear disc brake system consists of:
zsolid, full- cast brake disc (2C026).
z hydraulically activated rear disc brake caliper (2552).
z integral mechanically (cable) operated parking brake mechanism that is self- adjusting.
Rear Disc Brake System Components SECTION 206-
04: Rear Disc Brake 2003 Mustang Workshop Manual Item Part Number Description
1 2552 Rear disc brake caliper
2 2C028 Brake disc shield
3 N606675-
S2 Bolt (3 req'd each side)
4 1104 Wheel hub
5 2C026 Brake disc
6 4B423 Rear wheel hub retainer
7 W623485-S2 Nut (2 req'd each side)
8 N805163-S100 Bolt (4 req'd) Klj . 1 ba
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1.
CAUTION: Install the brake pads in full axle sets. Do not install new brake pads on
only one side of vehicle.
Install the new slipper and brake pads.
2. Position the caliper on the anchor plate and install the bolts.
3. Install the wheel and tire assembly. For additional information, refer to Section 204 - 04 .
4. Lower the vehicle.
5. WARNING: Use of any other than approved DOT 3 or DOT 4 brake fluid will cause
permanent damage to components and will render the brakes inoperative.
WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact
with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush eyes
with running water for 15 minutes. Get medical attention if irritation persists. If taken
internally, drink water and induce vomiting. Get medical attention immediately.
CAUTION: Brake fluid is harmful to painted or plastic surfaces. If brake fluid is
spilled onto a painted or plastic surface, immediately wash it with water.
Check the fluid level at the master cylinder. Add fluid if necessary.
6. WARNING: Pump the brake pedal several times to make sure the caliper piston is
extended to its operating position. Failure to follow these instructions may result in
personal injury.
Verify correct brake operation. Klj . 3 ba
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DESCRIPTION AND OPERATION
Parking Brake
The parking brake system is cable-
actuated and controlled by an independent hand- operated parking
brake control (2780). To apply parking brake, pull parking brake control upward as far as possible.
The parking brake system is an AUTO- ADJUST system. The spring in the parking brake control
continuously adjusts the cable tension in the system.
Brake Warning System
A parking brake warning indicator:
zis located in the instrument panel.
z illuminates to signal the driver the parking brake is applied or to signal a low fluid condition.
z remains lit when a brake malfunction has occurred.
SECTION 206-
05: Parking Brake and Actuation 2003 Mustang Workshop Manual Item Part Number Description
1 2780 Parking brake control
2 2552 Rear disc brake caliper Klj . 1 ba
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The dual brake system is split front and rear with the front wheel brakes comprising of one circuit and
the rear wheel brakes, the other circuit.
Brake Fluid
WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with
eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush with running
water for 15 minutes. Get medical attention if irritation persists. If taken internally, drink water
and induce vomiting. Get medical attention immediately.
Clean, fresh Ford High Performance DOT 3 Brake Fluid C6AZ-19542- AB or equivalent DOT 3 fluid
meeting Ford specification ESA- M6C25-A is the only brake fluid that should be used in Ford vehicles.
z Do not reuse brake fluid drained or bled from the system.
z Do not use brake fluid that has been stored in an open container.
z Do not mix different types of brake fluid.
Brake Master Cylinder
The brake master cylinder is a dual piston type. The brake master cylinder operates as follows: zWhen the brake pedal (2455) is depressed, pressure is applied by mechanical linkage to the
primary and secondary piston.
z Brake master cylinder pistons apply hydraulic pressure to the two hydraulic circuits.
z Brake master cylinder will not be overhauled, a new master cylinder is installed only.
The brake master cylinder consists of:
zbrake master cylinder reservoir (2K478)
z brake master cylinder body
Brake Master Cylinder Reservoir
NOTE: Whenever the brake master cylinder reservoir is removed from the brake master cylinder, new
grommets must be installed.
The brake master cylinder reservoir :
zis mounted to the brake master cylinder.
z holds fluid supply for each brake master cylinder hydraulic piston.
z provides visual fluid level markings.
z contains the brake master cylinder fluid level sensor. Klj . 2 ba
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