Fuse # 1 Keeps blowing when car is put into reverse

??

BobHyatt said:

Check repeatedly with an ohmmeter to see if either of the two pins ever short to ground as someone goes back and forth from neutral to reverse (no need to crank the thing of course). If either pin grounds out at any point, the switch is gone.

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So this test is hooking one of the ohmeter cables to one of the prongs, and one to the chassis of the car or the transmission case? What would I be looking for on the ohmeter to know that it has shorted to ground?

I went ahead and swapped the switch out, and learned that that the switch can be used as a tranny fluid drain plug as well, or at least half of it , anyways, before I swapped the switches, I hooked the ohmeter tester and tested the switch itself (2 prongs) repeatedly (rerverse-neutral, reverse-neutral), and saw normal resistance when in reverse and sometime the ohms would jump from .003 ohms, to like 12.23, .175, 3.5 (Random) Ohms-when switching in and out of reverse, is that normal? the switched looked fine to me, so tommorow I gonna refil the tranny fluid, replug the harness and hope for the best (didnt want to even try, needed to drain the rest of the tranny fluid and clean up the initial mess I made).
Now I am doubting that it's the switch, if it doesnt work I'm going to give up and take it to a shop, and just pay for it to get fixed. I figured at least I tried, and learned some new stuff. or just drive it till next year, then get it fixed. that ludadris song starting to sound real good to me now.
when the inspection guy says hey your reverse lights dont work, I'm gonna be like, 'let me show you how it's done,' "MOVE BISH, get out the Way..." .