CONDITION POSSIBLE CAUSES CORRECTION
DRUM BRAKE SCRAPING
OR WHIRRING
1. ABS wheel speed sensor or tone
wheel.
1. Inspect, correct or replace faulty
component(s).
SCRAPING (METAL-TO-
METAL).
1. Foreign object interference with
brakes.
1. Inspect brakes and remove foreign
object.
2. Brake shoes worn out. 2. Replace brake shoes. Inspect rotors and
drums. Reface or replace as necessary.
OTHER BRAKE CONDITIONS
CONDITION POSSIBLE CAUSES CORRECTION
BRAKES CHATTER 1. Rear brake drum out of round or
disc brake rotor has excessive
thickness variation.
1. Isolate condition as rear or front.
Reface or replace brake drums or
rotors as necessary.
BRAKES DRAG (FRONT
OR ALL)
1. Contaminated brake fluid. 1. Check for swollen seals. Replace all
system components containing rubber.
2. Binding caliper pins or bushings. 2. Replace pins and bushings
3. Binding master cylinder. 3. Replace master cylinder.
4. Binding brake pedal. 4. Replace brake pedal.
BRAKES DRAG (REAR
ONLY)
1. Parking brake cables binding or
froze up.
1. Check cable routing. Replace cables
as necessary.
2. Parking brake cable return spring
not returning shoes.
2. Replace cables as necessary.
3. Service brakes not adjusted
properly (rear drum brakes only).
3. Follow the procedure listed in the
adjustment section.
4. Obstruction inside the center
console preventing full return of the
parking brake cables.
4. Remove console and remove
obstruction.
BRAKES GRAB 1. Contaminated brake shoe linings. 1. Inspect and clean, or replace shoes.
Repair source of contamination.
2. Improper power brake booster
assist.
2. Refer to power brake booster in the
diagnosis and testing section.
EXCESSIVE PEDAL
EFFORT
1. Obstruction of brake pedal. 1. Inspect, remove or move obstruction.
2. Low power brake booster assist. 2. Refer to power brake booster in the
diagnosis and testing section.
3. Glazed brake linings. 3. Reface or replace brake rotors as
necessary. Replace brake shoes.
4. Brake shoe lining transfer to brake
rotor.
4. Reface or replace brake rotors as
necessary. Replace brake shoes.
EXCESSIVE PEDAL
TRAVEL (VEHICLE STOPS
OK)
1. Air in brake lines. 1. Bleed brakes.
2. Rear drum brake auto-adjuster
malfunctioning.
2. Inspect and replace drum brake
components as necessary. Adjust rear
brakes.
PL BRAKES-BASE 5s - 3
BRAKES-BASE (Continued)
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