I have a 1996 Audi a4 2.8 non quattro. The ABS brakes keep locking up while driving. They start off normal and within a few miles they gradually lock on.

If the vehicle does not have ABS brakes, The wheels will lock on a hard/panic stop. This is why ABS was developed so the operator can maintain some control during hard/panic stops

This is the light for your anti lock brakes.This is the unit that allows you to stop without locking up your tires.This is a system of sensors,pumps and actuators.This light is telling you that there is a problem with your ABS system that needs to be inspected for proper operation.Most all of your brake shops have a computer that will diagnose the problem for you for a small fee.Your brakes will still work but I don't recommend putting it off.

ANTI LOCK BRAKE LIGHT.MEANS ANTI LOCK BRAKES NOT WORKING.CHECK ABS FUSE AND RELAY.IF ALL IS GOOD.HAVE THE ABS BRAKE SYSTEM CODE SCAN.NOT SAFE TO KEEP DRIVING.HAVE FIX QUICK AS POSSIBLE.BECAUSE THE ABS BRAKE UNIT IS PART OF YOUR MAIN BRAKING SYSTEM.IF ABS BRAKE UNIT BAD BY BEING PART OF THE MASTERCYLINDER IT CAN CAUSE COMPLETE BRAKE FAILURE.

i believe thats a tune up issue- plugs wires

Fuses: Fuse arrangement in fuse panel, behind instrument cluster, left
Fuse Arrangement In Fuse Panel

1 - Heated washer jets 5A 2 - Turn signals 10A 3 - Headlight washer (relay), illumination for glove
compartment, climate control, Automatic Transmission, instrument cluster 5A 4 - License plate light 5A 5 - Instrument cluster, seat heating, test connection
for cruise control, bulb monitor for auto-check display, Automatic Transmission display, switch
lighting, mirror switches and actuators, airbag
warning light, outside temperature indicator,
climate control 10A 6 - Central locking system 5A 7 - Anti-lock brake system (ABS) 10A 8 - Vacant 9 - Mirror heating 10A 10 - Vacant 11 - Cruise control (Automatic Transmission) 5A 12 - On board diagnostic system 10A 13 - Brake lights 10A 14 - Interior lights, reading lights, anti-theft alarm system, vanity mirror 10A 15 - Instrument cluster, power windows, climate control, automatic transmission 10A 16 - Anti-lock brake system (ABS), Anti-Slip Regulation (ASR) 5A 17 - Heated door locks 10A 18 - High-beam, right 10A 19 - High-beam, left 10A 20 - Low-beam, right 15A 21 - Low-beam, left 15A 22 - Side marker and tail light, right 5A 23 - Side marker and tail light, left 5A 24 - Wiper and washer system 25A 25 - Blower for heating, climate control 30A 26 - Rear window defogger, mirror heating 30A 27 - Rear window wiper 15A 28 - Fuel Pump 15A 29 - Engine timing 30A 30 - Sun roof 20A 31 - Tail lights, cruise control, automatic transmission 15A 32 - Engine timing 20A 33 - Cigarette lighter 15A 34 - Engine timing 15A 35 - Trailer recptacle 30A 36 - Fog lights 15A 37 - Radio 20A 38 - Luggage compartment light, central locking system 15A 39 - Emergency flasher system 15A 40 - Horn 25A 41 - Anti-lock brake system (ABS) 25A 42 - Vacant 43 - Vacant

Hi, I had the same problem. it is the imoboliser, it reads a code in your key while starting. you need to get the code in the key reprogramed. if that wont work you will need to get a new ignition barrel. Audi dealer will reprogram your key.

your abs system is malfunctioning. i would suggest that you take the car to a dealership asap

tap on the back calieper with a hammer to try free the brakes possible the calieber is bad or tap on brake lines to free up any debry may help?

It's the brake pedal switch. There is a switch down on the pedal arm that closes when you press the pedal down, and sends a sensing voltage to the controller, telling it the brakes are applied. This allows the transmission lock to disengage so you can shift out of Park. When that switch fails, the lock won't disengage. You need to replace that switch and you'll be fixed.

depending on the system if it is 2 channel or 4 channel one of the sensors that are located on the backing plate located behind calipers is eithier faulty or dirty you can try brake cleaner these sensors use a small magnet pickup device to sense when the wheel "locks up"