1999 Windstar intermittent ABS light

My wife's Windstar has had the ABS light come on two times in the last two weeks when it was raining out. The light was on when van was first started for the day. Both times we drove a short
distance, ran an errand and when we got back in and restarted van the light was off. Any ideas? I'm thinking one of the wheel sensors might be caked up with dirt? TIA
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Make sure your brake fluid level is correct.
Ed
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.