[ImperialCrown]

Welcome to Allpar. You need 2 operating FOBs in order to program a 3rd by following the self-programming procedure described in the link.
Since you only have one FOB that works, you will need to have the 2nd one programmed with a scan tool like a Chrysler DRB III (or equivalent).
Have both FOBs with you during the scan tool programming procedure as both will have to be done together at the same time.

 

[valiant67]

You should be able to program a second remote with only one working on a 1997 van because I could with my old 1999 van.
I am unsure the process in the other thread is valid or necessary. The instructions for programming a second remote with one working remote were in the owner's manual for my 1999 van.

 

[gusc]

My 2003GC, too, only requires one working key to program up to three more.

 

[ImperialCrown]

My bad. I'm confusing RKE (remote) with SKIM (Sentry) key self-programming.
If you have 3 working SKIM keys, you can program others.
http://www.ebay.com/gds/CHRYSLER-COMPUTER-CHIP-RFID-SENTRY-KEY/10000000000900126/g.html

 

[gusc]

My bad too, I meant remote - not key!

 

[Rdkendrick]

My bad. I'm confusing RKE (remote) with SKIM (Sentry) key self-programming.
If you have 3 working SKIM keys, you can program others.
http://www.ebay.com/gds/CHRYSLER-COMPUTER-CHIP-RFID-SENTRY-KEY/10000000000900126/g.html

I know, on the Grand Cherokee, you only need two SKIM keys to program a 3rd. Maybe the vans are different.
I WAS able to re-program a 2nd old remote on my wife's 2000 T & C.

 

[valiant67]

Yes, prior to the SKIM keys you only needed a single working remote to program another remote. The newer chip keys (SKIM) are a different animal, requiring 2 to program a new one.