Battery Voltage Loss With Key Out

Set up a current test that you KNOW the results, like, maybe, the dome light circuit, to make certain your current function is not damaged. Many less expensive meters are not well protected, others have a fuse in the current circuit.
I first owned a (then new) Fluke 7X series in about '93. Since then, and several more similar Flues, I've popped the (expensive) current fuse about 5 times. They are EXPENSIVE!!!