OK, got a bit of work in today...  I swapped out the engine water temp sensor.  Also, I took out the gauge cluster and cleaned all the contacts.  To be honest, it did not look that bad, but I did it anyway, since they were already out.  There WAS a BIT of corrosion where the plug attaches to the film, but nothing to write home about (honestly speaking, I doubt that was an issue, but I cleaned it up anyway).  Now I got a working temp gauge, and it's pretty solid (not wiggly like the video!).
I also looked at the lockers for any leaks.  i did find some leaks where the hoses go into the compressor (slight leaks, nothing big), so I fixed that.  There is still a leak somewhere, but I could not find it, but now, the compressor comes on about once every 10 minutes or so, so it's not that bad: however, that is with the Jeep sitting; I have yet to try the lockers on while the Jeep is rolling (got to find a dirt road somewhere near to try that one).  Since I alrady changed the air temp sensor, the only sensor pending a swap is the oil pressure sensor, but I was already late for a family gathering (my wife's family, so even more demand placed on meeting the scheduled time!).  I also have to install the Flex-a-lite fan controller; I am currently running the fan permanently through the relay), as my DC Control box went south some months ago...  I got the other one sitting there, but I have not yet installed it.