OK, so I don't know if anyone is going to believe this or not!!!
I spent a couple hours at the local junkyard today searching for a replacement one of these, and failed complete, although I did find a new trunk light switch which I needed out of a FLATTENED '96 SE.
So I came back home to reinstall the "dead" old receiver unit in the car, so we could still have lock-unlock functionality while I waited to get a new one.
I hook it up, press the lock button, the car does it'* "bing bing bing" sound, then I press it again and the car locks, ok that was expected.
Then just for the hell of it I decided to try jumpering the 4-8 once again, cause why not, it couldn't hurt. I put the jumper in, close the door, turn the key, and LOCK-UNLOCK, the reprogram sequence started to work!!!!!!!!
So I guess the Motorolla micro controller in there just needed a good restart since it doesn't ever get restarted in its always on state.
So I reprogrammed my 2 fobs and I'm a happy guy!
Thanks for the help everyone.
1999 Mustang GT - 5 Speed - Modded to hell
2004 Infiniti G35 - Loaded - 6 Speed
1998 SSEi - Black & Chrome - Dual 10" Infinity
1997 SSEi - White & Chrome - Rear ended, and written off.
1995 SE - Green & Gold - Given away, :(