IR remotes are not programmable by the vehicle owner - they programmed in the factory; you had to pull the little dome off the headliner and give the dealer the 5-digit number found on a little sticker on the circuit board and give it to the dealer when ordering a remote so it could be custom-assembled to match the receiver in your vehicle. The remote had a little sticker inside it too with the same code number.
Only remotes and receivers that were built to the same code number will talk to each other, and nothing short of an oscilloscope, a 12V supply, and good surface-mount soldering skills will change that.
I bought my '92 at the end of 1997, and it came with one factory remote that never actually worked. By 1998 or so the remotes were no longer available from the dealers, (and even if they were, they were absurdly expensive). The internet searching I did after finding that out led me to Piland Electronics, the only other source of Jeep IR Keyless remotes I ever found out there as I noted in my earlier post above. I spoke to Mr. Piland when I was ordering my first remote from him back in 1999-2000, and he claimed at the time to be the only non-Chrysler source who could decode those little numbers and properly "program" remotes. Very nice and knowledgeable fellow, and gave first-rate service too, he was quite pleased to sell me just a fresh shell when they key ring loop broke off my remote after several years in my pocket. When I retired my IR setup, I'd gotten 10 years of flawless service from the remote he sold me.
I offered up the link to his website many times over the years when someone here posted looking for an IR remote, but the site looks to have gone offline at the end of 2015 - the final snapshot the "Wayback Machine" took was in December of that year, and there's no trace I can find of him opening up shop on another website. Here's the link to that snapshot so you can poke around in it, there's nice info there about how to obtain the code number I mentioned earlier in this post:
https://web.archive.org/web/20151226072625/www.thejeep.com/piland.html. I wonder whatever happened to the "box" he told me he built to decode those code numbers...
If you did buy that remote/receiver pair, have a good look at the reciever board and inside the remote to confirm that the little stickers both have the same code number (and are therefore a properly matched set). If you can't find the two code numbers, the only way to know for sure whether the two will interact is to plug it in and try it.
Unfortunately, much as it pains me to say it, the IR remotes used on 88-92 trucks are now up around 30 years old now, and I have serious doubts about the circuit boards in the remotes still working, given that my OEM remote's circuit board was literally crumbling into powder by the time it was 5 or 6 years old. I shudder to think what may or may not be left after a couple of
decades...
I still have my Piland remote and IR receiver dome stashed at home and they did work when I pulled them out to do the headliner/Chrysler Concorde keyless conversion, but after 10 years in a ziploc bag in the garage it's anyone's guess whether it's still functional. If it is, mine and devildog0's could well be among the last working IR setups in existence.
I stand by what I said originally - splicing in an aftermarket keyless kit or something like the setup from the 95 LH sedan are your best hope for getting a usable keyless function on this thing.
All that said, since you already have those parts on the way, give them a try - you might get lucky and they'll work (at least for a little while)...