Here is my how2 write up.
http://www.grandprixforums.net/threa...BS-Diagnostics
You need to set the multimeter to "ohms" not "volts". You can use the meter at the main unit to check the hub sensors and wiring to all 4 wheels. If you get an open circuit you then go to that wheel to see if it's the hub sensor or the wiring
I found out on the last repair that the connectors to the wheel hubs go bad too....Dorman makes a replacement harness that gives you the hub connector and about 3' of wire to splice into the main harness.
