Best way to test gauges???

I have been testing with a 6v battery for a short spurt. I havent tested all of them, but for some I have, seems to work great! Cant remember which one, but you have to do it differently(havent done it yet)

67dart273 as you can see with lots of threads, ya can get into a pissing match. Gryzynx helped me out, and if you pm him I am sure he will help you too, or start another thread asking the same question. Gryzynx never told me not to post his info, but I respect his reply here and wont post it unless he gives me the ok.