Hey thanks for the helpful tips! I just tried what you said and the gauges do move when you ground out the wires to the engine block. I did this with the oil and water temp gauges and I replaced the water temp sender and it is still acting crazy. So where did you say that I should put the volt/ohm reader to check the voltage regulator, just right on the regulator? And do you have any idea on how many volts I should be wanting to get from the regulator?