How to troubleshoot the ABS system on an Audi 80?

I've been experiencing issues with the ABS system on my Audi 80. Whenever I start the car, the ABS light stays on and the system seems to be malfunctioning. How can I troubleshoot and fix this problem?

To troubleshoot your ABS system, start by checking the fuse and relay for the ABS module. These can sometimes become loose or faulty, causing system malfunctions. If the fuse and relay are fine, then it's possible that there is an issue with the ABS sensors. Check if they are dirty, damaged, or need to be replaced.

Another potential cause for your ABS system malfunction could be low brake fluid levels. Check the brake fluid reservoir and make sure it's filled to the recommended level. If it's low, top it up and see if the ABS light goes off. If the light persists, it may be a sign of a bigger issue and you should take your car to a mechanic for further diagnosis.

In some cases, the ABS system can malfunction due to a faulty ABS control module. This is a more complex and expensive issue to fix and will require professional help. It's best to take your Audi 80 to a reputable mechanic or dealership for diagnosis and repairs.