I'm not any authority on this stuff, but I have never heard you have to switch to a volt meter. Mine works well, and I've been using it for several months now. Don’t under estimate how tough some of these components are, I was running my truck with 12 volts for about a month without disconnecting the gas gauge, I figured it was fried, so I didn’t bother. Yesterday I hooked it up properly to the sender and it worked perfectly, not fried at all.
