the abs light on dash goes out when i start car as it should on 1994 Jeep Grand Cherokee

turns back on after 1 minute the guy i got car from replaced a lug nut and stud on left rear is it possible the abs sensor has dirt or got moved when he remove brake drum

Asked by for the 1994 Jeep Grand Cherokee
Have the abs system scanned!!!
1 more answer , 1 more comment
yes ,take the wheel off and check the connection at the abs sensor if the connection is ok then cycle the key three times the abs light should flash a code look for the light to flash 2 times such as 4times first time and maybe 2 times for second time which would be a code 42 eg once you get the code you can ask a mechanic what the code means if the light comes on and stays on it should have a stored code
That's fine IF there is a sensor at each wheel. I think the sensor is mounted
on diff. gear for rear abs.
Have ABS system scanned.