...so the latest from the 98 xj8 is that the keyless entry remotes were lost so I bought a used one from fleabay. When I do the "lights on bright and hold, turn the key...ect, I get the programming mode chirp but the car never recognizes the remote no matter what I push or how many times. Took it to the local auto parts store and the Energizer test stand thingy recognized the button I pushed right away. Any thoughts? I'd think the module must be awake since I get the chirp.

 

There are 2 different keyfob transmitters for the X308!!!!!!
Maybe you got the wrong one???????????????

bob gauff

 

Well crap. You are probably right. I'll do some searching. Thanks for the info.

 

The one on the LEFT is the EARLY.
The one on the RIGHT is the LATER.

bob gauff

 

When I bought my car, mine didnt work either. The PO said he wasnt sure why. First I replaced the battery, then I found the DIY steps youre referring to. It works great now, but I didnt get it to work on my first try. I did it at least 5 or 6 times before I got it exactly right and it began working properly. Hopefully this helps too

 

Bob nailed it. No surprise. Looking at his pic I have a late remote and an early car.