1997 Mercury Cougar Brake Service (ONLINE REPAIR MANUALS)

Accessing Diagnostic Trouble Codes

Thunderbird & 1997 Cougar

The ABS module is capable of performing an on-board diagnosis using the Rotunda Super Star II Tester tool No. 007-0041B or New Generation Star (NGS) tool No. 007-00500, or equivalent. The module monitors system operation and can store all defined diagnostic trouble codes in its memory. The Diagnostic Trouble Codes (DTCs) can be retrieved from the ABS module as follows:

If the first DTC received is in the 20's and no other DTC is received, service the indicated component. No other DTCs can be output if a 20's exists. A...

Remove wheels and inspect brake disc, calipers and linings. Inspect and repack wheel bearings if necessary.

If the caliper is cracked or fluid leakage through the casting is evident, it must be replaced as a unit.

If caliper was removed when installing new parts, clean all parts in alcohol, then wipe dry using lint-free cloths. Using an air hose, blow out drilled passages and bores. Inspect dust boots for punctures or tears. If punctures or tears are evident, install new boots during assembly.

Inspect piston bores in both housings for scoring or pitting. Bores showing light scratches or...

Disc brake service is critical due to the close tolerances required in machining the brake disc to ensure proper brake operation.

Maintaining close control of the shape of the rubbing surfaces is necessary to prevent brake roughness. In addition, the surface finish must be non-directional and maintained at a micro-inch finish. This is necessary to avoid pulls and erratic performance and promote long lining life and equal lining wear of both the lefthand and righthand brakes.

Do not attempt to refinish the rubbing surfaces unless precision equipment,...

On Vehicles Equipped With Anti-Lock Brakes Refer To "Anti-Lock Brakes".

Vacuum Assist Diaphragm Type

The vacuum assist diaphragm assembly multiplies the force exerted on the master cylinder piston in order to increase the hydraulic pressure delivered to the wheel cylinders while decreasing the effort necessary to obtain acceptable stopping performance.

Vacuum assist units get their energy by opposing engine vacuum to atmospheric pressure. A piston, cylinder and flexible diaphragm utilize this energy to provide brake assistance. The diaphragm is balanced with engine vacuum until the brake...

On models with anti-lock brakes, the brake system power booster must be depressurized before disconnecting any hydraulic lines or fittings. Depressurize the system by pumping the brake pedal a minimum of 25 times with the ignition in the Off position.

After performing any service work, obtain a firm brake pedal before moving the vehicle.

Cougar, Sable, Taurus, Thunderbird & 1997-98 Continental, Mark VIII & Mustang

Removal

On models with air suspension, turn service switch Off before beginning repairs.

• Raise and support rear of vehicle, then remove wheel and tire assembly.
• Remove bra...

Pressure bleeding is recommended for all hydraulic brake systems. Ensure all dirt and contaminants are removed from master cylinder area prior to removing reservoir cap.

To prevent air from the pressure tank getting into the lines, do not shake the tank while air is being added to the tank or after it has been pressurized. Set the tank in the required location, bring the air hose to the tank, and do not move it during the bleeding operation. The tank should be kept at least one-third full.

On vehicles equipped with disc brakes and master cylinders without proportioners or press...