Kind of a general question, but what exactly is the voltage gauge in my dash reading? Is it supposed to be the battery voltage? Because my dash gauge always reads about 1 volt off from when I check across the battery terminals with a voltmeter.
When my truck is running, the gauge will read one volt higher, and when the truck is not running but the key is on, the gauge will read one volt lower than across the battery terminals.
Just curious if this is normal?
System is 12 volts, if it matters.
