Voltage Regulator

OK, measuring from the blue to the pos. terminal, (engine off, switch on) read .33 volts
Measuring from the voltage regulator case to the neg. terminal I got .01 volts at idle.
Turned on everything I could and got .09 volts.
Tomorrrow, I am going to take the ground strap (engine to firewall) loose and clean at the firewall. Already did it at the engine.
I think, the local Advance auto can test the VR if I take it off.

Any other suggestions are appreciated!!
And thanks for taking the time to write such a detailed response.