One more Auto Meter Gauge question - VOLTS METER

[DrtyJack75]

Ok, I got everything hooked up.....but I got ONE more question! (ok I might have more but Im hoping this will be my last)

My gauges have a POSITIVE LEAD, a GROUND, and a SENDER..

I have the positive all linked together with the power from the rest of the gauges, I have the ground the same way.....

and then I noticed I didnt have anything to the sender BUT I was getting a VOLTS reading...

?????????????????????????????????

How is that possible? Shouldnt I have to put the wire that I have going to the battery to the sender to get a VOLTS reading??

?????????????????????????????????


THANKS!!