Brake warning lights stay on!

'90 Dak LE, 3.9, 130K miles. When i started it this morning the "anti lock" and "P brake" light stayed on and they won't go off. What does this signify and how can I turn them off?
Thanks
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
It is saying that you have a problem in the anti-lock brake system. The most common cause is a bad speed sensor in the rear axle but that is not always the case.
--
If at first you don't succeed, you're not cut out for skydiving


"Bob" < snipped-for-privacy@sbcglobal.net> wrote in message
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.