1991 Ranger rabs

i have a 91 ranger 2wd 3.0 ext cab blah blah blah....i had recently changed the abs valve and the rear diff sensor....after doing so the rear antilock and brake light came on....

did all the usual checks for the brake light being on, nothing worked so i pulled a code from the rabs module and got code 4

looked it up on a couple thing including alldata and got open/grounded valve reset circuit from one place and rabs valve switch closed or open dump valve which screwed me up big time....:banghead:


if some one could help with some info/diagnosis that would be great



thanks