Iy do not have a voltmeter (yet) ok, so I might also have glo plug issues-I thought the wait light bulb was burned out but after checking the bulb again today It looks like it might be ok. I need to still get the batteries checked out and go get the VOM. When I had the first switch malfunction The volt/bat gauge fried, do I need that to run or is it just a gauge, and not necessary for function-or is it necessary?