Recently the transmission range indicator (PRND1234) in my instrument cluster is messed up. It often won't display that I am in Neutral when the others work (it stays stuck in Drive, then when I go to Reverse it lights up N then R), sometimes does not show that I am in Park (it sits at Reverse), it often will display that I am in all of PRND1234 (all squares lit), and once in Neutral it indicated nothing at all. Sometimes it will display P when started (after the startup test of all lit), then it will light them all again after a few seconds. Sometimes it works just fine.As far as I can tell so far, the car's transmission operates just fine, regardless of what the indicators say. The Service Manual states that the Transmission Range Sensor tells the Transmission Control Module what gear it is in, and this is all located in the transmission itself. I mention this because I was just mucking about inside the center console beneath the shift lever, but I didn't touch the shift linkages or other cables and wires down there that were not part of my aftermarket car alarm. If I had screwed it up from inside the cabin, the transmission wouldn't be shifting when I use the lever. I think my recent work and this problem are coincidental.Any ideas? I've tried unplugging the TCM fuse for a while to no avail.