I read the DIY wiki posted by member Yak:
PeachPartsWiki: Antenna mast replacement (with old cable stuck inside the motor housing)
and found this about the plugs on the chassis and antenna ends for 6000U antenna (paraphrased):
Mercedes connector in car
Pin 1: Combined Red and Red/Yellow/White = power
Pin 2: Blue w/ Gray stripe = trigger
Pin 3: Brown = Ground
Pin 4: Empty
Pin 5: Black = intermediate up (or maybe down)
Pin 6: Blue = intermediate down (or up?)
Wires on antenna
Pin 1: lightish Blue = power
Pin 2: Green w/yellow stripe = trigger
Pin 3: Brown = ground
Pin 5: Black = up, or maybe down
Pin 6: Black = down, or maybe up
Given this information and the picture of my multimeter, could someone instruct me on how to test if there is power at the chassis end of the plug? Or how about how to test the antenna itself by connecting it to a battery to see if the mast will extend?