I bought a 93 Civic Sedan knowing that the abs light was on. I though it could be because it was low on brake fluid, but it wasn't that. I'm thinking it could be because of a malfuctioning wheel speed sensor. Anyone know how to diagnose the ABS system? Diagnostic tools required? Or is there a service jump cable where you can just jump it and it'll throw you codes simular to how you would with an engine code where you just jump the service cable? Any help will be honored.