Measuring the voltage from negative battery cable clamp to alternator bracket, I am getting a reading of 35mV.

From the positive battery cable clamp to alternator B+, I am getting 450mV. This is at idle with electric rad fan, head lights, and blower motor set to max with no A/C.

The negative test is fine, under 200mV. But, the positive test seems high, over 350mV.

What readings have you seen?

 

You should have less than 70mA total draw with the doors closed and everything off.

That is inline between the battery and the positive battery clamp