Tech Tips (by ALLDATA): Hyundai Sonata front brakes dragging

TECH TIPS (courtesy of ALLDATA)

Mileage: 155,080

Problem: The customer brought the car in because the front brakes were smoking. The technician put the car on the rack and confirmed that the front brakes were locked-up and the front brake system was badly damaged.


Details: After the technician replaced the front brake pads, calipers, rotors, and brake hoses, and bled the brake system, the brakes were still dragging as before. The technician then replaced the brake master cylinder but the problem persisted.

Confirmed Repair: The Tech-Assist consultant advised the technician to check the brake booster intermediate rod and brake-lamp switch adjustments. The booster intermediate rod was adjusted properly but the brake-lamp switch was not. The switch was not allowing the brake pedal to completely return. After adjusting the brake-lamp switch, the brakes began to operate normally.