Turn signal flasher?

I will give that a try as well. I have to think its a problem with the switch because I noticed it would start in any gear. Its an automatic. Thanks for your help, Ill post the final outcome on Monday when I get a little more time to work on it.
I really don't think fluid in the harness connector can be such a constant short. That switch screwed into the trans can be all these problems though, shorting reverse lamp circuit to the neutral safety ground path, blowing fuse and all. Especially if its the wrong switch. It'll break, short, and leak fluid.
A pic of all 3 switches was shown in another thread recently. Included 2 different lengths of the 3 post switches.