Parisitic Drain - 1980 Suburban

[SilverMiner]

I spent most of this evening attempting to hunt down a parasitic drain in my 1980 K10 Suburban.

I disconnected the negative cable and measured full battery voltage between the cable and the terminal using a digital multimeter even with the key off. I then proceeded to individually disconnect every item from the fuse block one at a time (more than once, actually, because I started out forgetting to close the door and of course the dome light was active). Unfortunately, removing fuses and connectors made no difference.

I wasn't able to get an accurate measure of how many amps the drain was pulling. My multimeter maxes out at 150 milli-amps, and whatever circuit was open is drawing more than that.

Should I be checking somewhere else beyond the fuse panel? I am already beginning to suspect the starter and/or solenoid and may replace them tomorrow just because everything else on the rig has been original so after nearly 34 years I should do it just on general principal.

Thanks for the help