We have a high voltage power supply for a painting system and I would like to know if there is a way to test relays in the chain of things that give the high voltage output. Is there a way to use a test meter on a relay? The relays in the box are the common small clear plastic cube type with the contacts visible. It's an older system and there are a couple of vacuum tubes in it. The manual says when the tubes heat up voltage is delivered to the first relay. The other day we lost several hours production because of a lightning strike and the crew replaced several parts in the system without knowing where the problem was-but their technique worked. Since relays are a common element in many systems I have often wondered if there is an easy way to test them.