[A4] abs light

[Thomas Stanton]

A few weeks ago my abs light and brake light came on. After talking to local mechanics they all said clean your wheel sensors and the light should go out. I cleaned my wheel sensors and my lights are still on. Where I live there are no real shops that have all the electronics to read the computer on a A4. My wife who drives the car every day tells me that sometimes when she pushes the brake peddle the lights will go off and when pushing on the brakes they feel like the abs is wanting to kick on with the pulsating feel. After a few minutes the lights come back on.  It sounds to me maybe a wire is not all connected, maybe corrosion is getting the best of a wire. Help me out, please.

Tom
98 A4 avant quattro