Battery Voltage Loss With Key Out

YO7_A66 said
I grabbed a backup battery and connected the Positive cable to this battery (12.4v) and then grabbed my meter (DC Ma) and connected into the disconnected Negative cable and then to the Negative post. With nothing on and the doors shut I got .02 on the Ma setting.
I then tried the parking lights, and they read .10 (original wiring). I then tried the headlights and it read .12 (headlights on relays). I then shut off the lights and I opened one door, and it read .02.

the values you are getting do not make sense. your meter might have a blown fuse or you did not switch the leads to the proper terminals. The parking lights should draw close to 1 amp each, 4 parking lights is 4 amps or 4000ma

try the test again but in the amp scale and be sure the leads are correct.

67dart273's point about the light bulb test is very valid