I have had my share of electrical problems with the VX there are a few things it could be

-I had a yellow top battery that had been drained and was powerful enough to do a lot of things (alarm included) but not sustain the VX running.

-There is a master set of wires that run all the way down to the transmission that sometimes frays and causes all kinds of problems, normally the problem is around the area directly behind the drivers side headlight. You will see a thick black bunch of wires, be careful and look for anything unusual.

-This same bunch of wires goes all the way down to where the trans shifter lever plugs into the TOD and such. Could be a problem there.

-I had this entire set of wires replaced and it did not fix my transmission problem, but it has cleared up some other peoples electrical problems. Try searching you might find something else.

-Ryan