Fuse keeps blowing, P0705 (Transmission Range Sensor Circuit Malfunction)

[wtd]

I did the voltage drop test (car turned off). I couldn't remember which probe went where, so I did both. Negative probe to engine block (positive to negative battery terminal), I got 0.3 millivolts. Negative probe to frame, the numbers kept changing, but would usually stop at around 50 millivolts.
Positive probe to engine block, I got 0 or -0.1 millivolts. Positive probe to frame, the number steadily climbed to 200 millivolts, read "OL," then started over. What does this mean?

You should be doing voltage drop tests with the circuits loaded which means key on, engine off. There cannot be a voltage drop if there is no current flow.
If testing positive side voltage drops, put the red multimeter lead on the positive battery cable and the negative lead on the positive part of the circuit that you are testing. The reading you get will be the actual voltage drop. For the ground side, put the black lead on the negative battery terminal and the red lead on whatever part of the ground system you are testing.