2003 FORD MUSTANG warning

Remove the axle shafts. For additional information, refer to
Axle Shaft in this section.
3. Wipe the lubricant from the internal working parts and inspect the parts for wear and damage.
4. Rotate the differential assembly to check for roughness indicating bearing/gear damage.
5. Using a suitable dial indicator and the special tool, measure and note the ring gear backface runout.
6. CAUTION: Mark the position and location of the bearing caps, as the arrows may
not be visible. Always install the bearing caps in their identical locations and positions.
Remove the bearing caps. 1. Remove the bolts.
2. Remove the bearing caps.
7. WARNING: Do not allow the differential assembly to fall. Failure to follow these
instructions may result in personal injury and component damage. CAUTION: Place a wood block between the pry bar and the differential housing Klj . 2 ba
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3.
CAUTION: Do not damage the threads in the bolt holes.
Insert a punch in the bolt holes, and drive off the ring gear.
4. Using the special tools, remove the differential bearings (4221), if necessary.
5. Remove the bolt and the differential pinion shaft (4211).
6. WARNING: Due to the spring tension, use care when removing the differential Klj . 2 ba
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36.
WARNING: The differential clutch spring (4214) is under tension. Remove the spring
carefully. Failure to follow these instructions may result in personal injury.
Remove the differential clutch spring.
37. Remove the differential gears. 1. Remove the two differential pinion gears (4215) and pinion thrust washers (4230).
2. Remove the two differential side gears (4236) with the clutch packs (4947) and the shims and tag them "left" and "right."
38. CAUTION: Keep the differential clutch packs in order. Do not mix them. Always
reassemble them in the same sequence.
Remove the differential clutch packs and shims from the differential side gears.
zClean and inspect the remaining differential components for wear and damage. Install
new parts as necessary. Klj . 14 ba
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z
Do not drop assembled halfshafts. The impact will cut the boots from the inside without
evidence of external damage.
z Inspect all machined surfaces and splines for damage.
Wheel and Tire Balancing, Rear
WARNING: Do not balance the rear wheels and tires while mounted on the vehicle.
Possible tire disintegration, differential or halfshaft failure can result, causing personal injury
or extensive component damage. Use an off- vehicle wheel and tire balancer only.
Hoisting
CAUTION: Use a frame- contact hoist only. Vehicle or component damage can result if
other types of hoists are used.
Never raise the vehicle using the halfshafts as lift points.
Undercoating and Rustproofing
During undercoating and rustproofing procedures, protect the boots from the coating materials.
Foreign materials on the rubber boots will cause extreme advanced wear. Klj . 3 ba
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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 schematic and connector information.
Inspection and Verification WARNING: Use of any other than the approved DOT 3 brake fluid will cause permanent
damage to brake 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: Do not spill brake fluid onto painted surfaces. If spilled, wipe up immediately.
NOTE: Always check the fluid level in the brake master cylinder reservoir (2K478) before performing
the test procedures. If the fluid level is not at the correct level, add High Performance DOT 3 Brake
Fluid C6AZ- 19542-AB or equivalent DOT 3 fluid meeting Ford specification ESA- M6C25-A.
NOTE: Prior to performing any diagnosis, make sure the brake warning indicator is functional. For
additional information, refer to Section 413 - 01 .
The first indication that something may be wrong in the brake system is a change in the feeling through
the brake pedal (2455). The brake warning indicator in the instrument cluster and the brake fluid level SECTION 206-
00: Brake System — General Information 2003 Mustang Workshop Manual Special Tool(s)
73 Digital Multimeter
105-
R0051 or Equivalent ABS Brake and Pressure Test
Kit
107-
02350 or Equivalent Tire and Wheel Runout Gauge
Set
134-
00199 or Equivalent Klj . 1 ba
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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 (Scotch Brite® type), remove any rust or
corrosion from the hub and brake disc mounting surfaces.
z Align the match- marks and reinstall the brake disc on the hub.
8. CAUTION: Do not use a bench lathe to machine brake discs.
NOTE: The depth of cut must be between 0.10 and 0.20 mm (0.004 and 0.008 inch). Lighter
cuts will cause heat and wear. Heavier cuts will cause poor brake disc surface finish.
Using on- vehicle brake lathe, machine the brake discs. Follow the manufacturer's instructions.
After machining, make sure the brake disc still meets the thickness specification.
9. Using a dial indicator, verify that the brake disc lateral runout is now within vehicle specification.
10. Remove any metal chips.
11. Remove the hub adapter.
12. Remove any remaining metal chips from the machining operation.
13. CAUTION: Do not carry out this step on rear drum- in-hat brake discs.
For vehicles with a two- piece hub and a non drum- in-hat brake disc assembly:
z Remove the brake disc from the hub.
z Remove any remaining metal chips from hub and brake disc mounting surfaces and from
the ABS sensor.
z Apply High Temperature Nickel Anti- Seize Lubricant F6AZ-9L494-AA to the mounting
surfaces.
z Using the match- marks, mount the brake disc on the hub.
14. Install the caliper and check brake operation.
Symptom Chart Symptom Chart
Condition
Possible Sources Action
z The Brakes Pull or
Drift z
Tire air pressure.
z Wheel alignment.
z Brake pads.
z Brake components.
z Suspension
component. z
Go To Pinpoint Test A .
z The Red Brake
Warning Indicator Is z
Instrument cluster.
z Circuit. z
Go To Pinpoint Test B . Klj . 4 ba
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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 Noise zDisc brake
component. z
MACHINE or INSTALL a
new brake component as
necessary. REFER to
Section 206 - 03 or
Section 206 - 04 .
z Hydro-Boost, No
Power Assist z
Power steering
pump.
z Linkage.
z Power steering
fluid flow.
z Hydro-boost unit. z
Go To Pinpoint Test E .
z Hydro-Boost Erratic
Operation, Sticks,
Binds or Grabs z
Supply hose.
z Hydro-boost unit. z
Go To Pinpoint Test F .
z Hydro-Boost Brake
System Operation
Suspect z
Leakage.
z Hydro-boost unit. z
Go To Pinpoint Test G .
Test Step Result / Action to Take
A1 CHECK THE TIRES
NOTE:
Check tire pressure with the brakes off.
z Check tires for uneven and excessive wear and for correct
pressure.
z Are the tires OK? Yes
GO to
A2 .
No
CORRECT as necessary.
RETEST for normal
operation. A2 CHECK THE ALIGNMENT
z
Check the caster, camber and toe. Refer to Section 204 -
00 . Yes
GO to
A3 .
No
CORRECT alignment as
necessary. REFER to Section 204 - 00 . RETEST for correct
operation. Klj . 6 ba
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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 for binding, wear, damage, contamination and
correct installation.
z Are the disc brake calipers, anchor plate guide pins
and brake pads OK? Yes
GO to
A4 .
No
REPAIR or INSTALL new
components as necessary.
RETEST for normal
operation. A4 ROAD TEST THE VEHICLE
z
Road test the vehicle, and observe whether the drift
occurs with or without the brakes applied.
z Does the drift or pull occur with the brakes applied? 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.
Test Step Result / Action to Take
B1 CHECK THE BRAKE MASTER CYLINDER FLUID
LEVEL SWITCH z
Key in OFF position.
z Disconnect: Brake Master Cylinder Fluid Level Switch
C124.
z Connect a fused jumper from C124- 2 circuit 977
(PK/WH) to C124- 3 circuit 128 (VT/YE). Yes
GO to
B2 .
No
INSTALL a new brake master Klj . 7 ba
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