How do I check the resistence on the speed sensors and where are they located?

 

Which sensors?
ABS?

 

ABS

 

To test them all I do is measure with the Ohm meter just to make sure the meter moves when the wheel is turned. The sensor mounts into the hub just below the connection where the strut meets the hub.

Some of the sensors have a plug and the sensor stays in the hub. Others there is one long wire into the engine compartment.