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I am having promlems installing my pyrometer on my 900 all the wiring looks good and when i start the sled the pyrometer lights up just like it should. I have the 12v wire for the lights and the guage both tied in at the same point point, at the back of the RPM guage brown and yellow wires. The problem arises when the sled is running the guage will just bottom out and sit there. Even when i rev it up to say 4200 RPM it still wont move. Just wondering if i am getting too much current to the guage or what the deal is.