| Problem |
Possible Cause |
Remedy/Repair |
| The brake pedal goes to the floor |
- Leak somewhere in the system
- Brakes out of adjustment
|
- Check/correct fluid level; Have system checked
- Check automatic brake adjusters
|
| Spongy brake pedal |
- Air in brake system
- Brake fluid contaminated
|
- Have brake system bled
- Have system drained, refilled and bled
|
| The brake pedal is hard |
- Improperly adjusted brakes
- Worn pads or linings
- Kinked brake lines
- Defective power brake booster
- Low engine vacuum (power brakes)
|
- Have brakes adjusted
- Check lining/pad wear
- Have defective brake line replaced
- Have booster checked
- Check engine vacuum
|
| The brake pedal "fades"' under pressure (repeated hard
stops will cause brake fade; brakes will return to normal when they
cool down) |
- Air in system
- Incorrect brake fluid
- Leaking master cylinder or wheel cylinders
- Leaking hoses/lines
|
- Have brakes bled
- Check fluid
- Check master cylinder and wheel cylinders for leaks
- Check lines for leaks
|
| The car pulls to one side or brakes grab |
- Incorrect tire pressure
- Contaminated brake linings or pads
- Worn brake linings
- Loose or misaligned calipers
- Defective proportioning valve
- Front end out of alignment
|
- Check/correct tire pressure
- Check linings for grease if greasy, replace
- Have linings replaced
- Check caliper mountings
- Have proportioning valve checked
- Have wheel alignment checked
|
| Brakes chatter or shudder |
- Worn linings
- Drums out-of-round
- Wobbly rotor
- Heat checked drums
|
- Check lining thickness
- Have drums and linings ground
- Have rotor checked for excessive wobble
- Check drums for heat checking; if necessary, replace drums
|
| Brakes produce noise (squealing, scraping, clicking) |
- Worn linings
- Loose calipers
- Caliper anti-rattle springs missing
- Scored or glazed drums or rotors
|
- Check pad and lining wear
- Check caliper mountings
- Check calipers for missing parts
- Check for glazing (light glazing can be removed with sandpaper)
|
| Brakes drag (will not release) |
- Incorrect brake adjustment
- Parking brake stuck or adjusted too tight
- Caliper pistons seized
- Defective metering valve or master cylinder
- Broken brake return springs
|
- Have brakes checked
- Check cable where it enters the brake backing plate. In winter,
water frequently freezes here
- Have calipers checked
- Have system checked
- Check brake return springs, replace if necessary
|
| Brake system warning light stays lit |
- One part of dual circuit inoperative
- Defective warning light switch
- Differential pressure valve not centered
|
- Have brake system checked
- Have brake system checked
- Have brake system checked
|