Contact Resistance Testing Begin by conducting contact resistance testing using a digital multimeter or micro-ohmmeter. Ensure the AC contactor is fully de-energized and all power sources are ...

Then, note the reading. 3. Repeat the process with the other terminals and OL relays and compare the readings. Try to place the test lead probes in the same relative position at each contact and OL ...

For all of you who have a multimeter thrown in a drawer or toolbox but don’t know how to use it, these instructions will help in your search for missing voltage.