1998 Jeep Wrangler Brake Service (ONLINE REPAIR MANUALS)

Accessing Diagnostic Trouble Codes

• Connect DRB scan tool to Data Link Connector (DLC), the DLC is located under lefthand side of instrument panel, near steering column.
• Turn ignition switch to On position.
• When DRB screen prompts, select "System/Anti-Lock Brakes/Teves," then read and record module information and any Diagnostic Trouble Codes (DTC)s that are output.

Diagnostic Trouble Code Interpretation

If a DRB diagnostic scan tool has been used to access the diagnostic system, refer to the "Diagnostic Chart Index" for a list of scan tool failure outputs. The outputs will correspond...

Prior to removing brake shoes it is recommended that a suitable clip or restraining device be applied to the wheel cylinders to prevent the wheel cylinder pistons from being pushed out of their bores.

Brake Shoe Removal

• Raise and support vehicle.
• Remove wheel and tire assemblies, then the brake drums.
• Remove U-clip and washer from parking brake lever pivot pin, Figs. and , then discard clip.
• Using suitable tool, remove primary and secondary return springs.
• Remove spring retainers, hold-down springs, and retaining pins.
• Install suitable clamps over ends of wheel cylinders.
• Remove adjuste...

Removal

Front

• Unfasten caliper as outlined under "Caliper Service." It is not necessary to disconnect brake hose from caliper. Support caliper at all times to prevent brake hose damage.
• Remove outboard brake pad from caliper by pressing one end inward to release pad lug.
• Rotate shoe upward until spring clears caliper.
• Press other end of pad inward to release other lug, then rotate upwards and out of caliper.
• Grasp ends of inboard pad and tilt outward to release springs from caliper piston.
• Clean caliper interior using clean shop cloths. Do not use compressed air, as damage to du...

Master Cylinder

Except Caravan, Town & Country & Voyager

The cylinder body containing the primary and secondary pistons is made of aluminum. The removable fluid reservoir is made of nylon reinforced with glass fiber. The reservoir is the only serviceable component.

The fluid compartments of the nylon reservoir are interconnected to permit fluid level equalization. The equalization feature does not affect circuit separation in the event of a front or rear brake malfunction. The reservoir compartments will retain enough fluid to operate the functioning hydraulic circuit.

Caravan, Town & C...

When working on or around brake assemblies, care must be taken to prevent breathing asbestos dust, as many manufacturers incorporate asbestos fibers in the production of brake linings. During routine service operations, the amount of asbestos dust from brake lining wear is at a low level due to a chemical breakdown during use, and a few precautions will minimize exposure. Do not sand or grind brake linings unless suitable local exhaust ventilation equipment is used to prevent exce...

Brake Lines & Linings

Remove one of the front wheels and inspect the brake disc, caliper and linings. The wheel bearings should be inspected at this time and repacked if necessary.

Do not get any oil or grease on the linings. It is recommended that both front wheel sets be replaced whenever a respective pad is worn or damaged. Inspect and, if necessary, replace rear brake linings also.

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

Brake Roughness

The most common cause of brake chatter on disc brakes is a variation in thickness o...