Inspection and Verification (Start Testing Here)

Visually inspect the following components for mechanical or electrical problems:
Mechanical
- Brake master cylinder
- Brake caliper piston
- Disc brake rotors
- Wheel bearings
- Brake pads
- Brake shoes and linings
- Brake drum
- Power brake booster
- Brake pedal linkage
- Booster vacuum hose
- Tires
- Debris

Electrical
- Parking brake switch
- Damaged or corroded wiring harness
- Brake master cylinder fluid level switch

For low or spongy brake pedal concerns:
- Check and, if necessary, refill the brake master cylinder reservoir.
- Bleed the brake system and retest the brake pedal feel.

For slow or incomplete brake pedal return concern:
- Inspect for binding, damage, correct installation or interference at the brake pedal.
- Check the power brake booster for binding, damage and correct installation.

For a vibration concern when the brakes are applied on a vehicle with rear disc brakes:
- Road test the vehicle.
- Apply the brakes and try to determine if the vibration is from the front or rear of the vehicle.
- If vibration can be felt from the rear of the vehicle, use a hub-mount brake lathe to machine the rear disc brake rotors if final thickness will be within specification. Retest the vehicle for normal operation.
- If vibration is felt from the front of the vehicle, use a hub-mount brake lathe to machine the front disc brake rotors. Retest the vehicle for normal operation.
- If the vibration location cannot be determined, use a hub-mount brake lathe and machine the front disc brake rotors if final thickness will be within specification. Retest the vehicle. If there is still vibration during braking, use a hub-mount brake lathe to machine the rear disc brake rotors if final thickness will be within specification. Retest the vehicle.

For a vibration concern when brakes are applied on a vehicle with drum brakes:
- Road test the vehicle.
- Apply the parking brake and note if vibration is felt.
- If vibration can be felt while applying only the parking brake, machine the brake drums if final inside diameter will be within specification. Retest the vehicle for normal operation.
- If vibration is only felt while applying the brake pedal, use a hub-mount brake lathe to machine the front disc brake rotors. Retest the vehicle for normal operation.