I`ve have a problem with the power to my autometer pyro gauge.when the lights come on I causes the pyro needle to drop 50 degrees.I was lucky enough to try another gauge and the problem is still there.The wiring is perfect (I have checked x10).But what I did notice is if the buld and socket is not in the gauge it will not fluctuate at all when the lights come on ? what could possibly make the gauge act up by just inserting the bulb?