We recently installed some new equipment and found an issue with one of the relays in the 24VDC control circuits. The relay was sticking open, so we checked the power to the relay. Oddly enough when the digital meter common (black) probe was placed on the 0VDC terminal to the relay, the meter showed voltage... the other probe (red) from the meter wasn't touched to anything. Thought the meter was bad, so I tried another meter and got the same result. Has anyone out there ever seen a digital meter back feed like this to give a reading when only touching one side of a circuit? If so, what is causing this?