2005 Dodge GC, Avital 4105L, Xpresskit PKUMUX

OK, will check that the PKUMUX wires are going to the correct side of the cut MUX wire. As for wrapping the antenna wire around the ignition cylinder, it already has a loop at the end. Do I just place the loop around the cylinder? Or do I need to make additional wraps of the wire around the ignition cylinder as well as having the loop at the end around the ignition cylinder? Also, the instructions are not clear... When I am done programming the PKUMUX do I leave the antenna wire wrapped around the ignition cylinder for it to work? Or do I remove the antenna wire when done? During my installation and testing I have left the antenna wire loop around the ignition cylinder.

If you have the pre-formed loop antenna, just locate it and secure it at the correct ignition switch cylinder location. This must stay in place permanently. This is what sends a transponder chip code to the vehicles pickup antenna during a remote start. Basically, the PKUMUX contains a transponder chip and you are adding a new key to the vehicle during programming.Soldering is fun!

I checked that the wires from the PKUMUX are going to the correct ends of the cut MUX wire at the ignition. I re-ran the ground wire straight to the ground screw I installed. I also used my meter to verify there is 12 volts at the PKUMUX. I retried the programming steps and still do not get the confirmation at Step 7 that the PKUMUX is programmed. Now, when I try to start the van the starter just clicks and it will not start with key or R/S. My guess is that I tried the programming feature to many times and it is locked out. Any idea how long I have to wait before the van will start again? Any other tips for getting the PKUMUX programmed? How do I know if the PKUMUX is bad? What else does it do besides send the correct signal to the vehicle when trying to start with R/S? If I cannot get the PKUMUX programmed what other options do I have at this point? Besides leaving a key in the ignition? :-)

kreg, Have done a bit more research and it seems the van can only program a total of 4 keys. We bought the van used and have no idea if it has programmed any additional keys besides the 2 we have. Could that be my issue? I would have to test again tomorrow morning, but when programming I do not think the security light stayed flashing after step 5. I believe it just stops flashing when I turn the 2nd key off.

Yes, you definitely need the confirmation beep at Step five to indicate the van is in "add new transponder key" mode to continue on. Are both the keys Dodge factory keys or do they look aftermarket? It would not allow adding another key ( or PKUMUX chip ) if you had one unique key and one clone key. You need two unique keys to add any more. That's another nice thing about the iDatalink bypass module I use. They only require one working key to program the bypass module to the van. If the starter motor just clicks, perhaps the battery is discharged after the having the door open for so long? Think I'd put a charger on it over night or try a jump start.Soldering is fun!

kreg, Battery was getting low. Battery charger fixed that. Last night I remembered we got a new key from the local Dodge dealer shortly after getting the van. It came with 2 keys and I had a local store try to make a copy so we could at least unlock the doors with the spare if my wife locked both original keys in the van. However they got one of the original keys stuck in the key copy machine. So, they paid for us to get a new one from the Dodge dealer. They gave us the original key back, it just has damaged teeth so will not work in doors or ignition. I took the computer out of the damaged key and placed it in one of the good ones and it starts the van fine, so I know the transponder in all 3 keys work fine I have tried every combination of the 3 keys to program the PKUMUX and still no luck. At step 7 of the programming, the security light just keeps blinking and does not go solid for 3 seconds and chime to let me know it programmed the PKUMUX correctly. I have the antenna wire wrapped around the very end of the ignition cylinder and used a wire tie to secure it. After trying to program the PKUMUX with all key combinations I did turn the key to the ON position and then grounded the blue/white wire from the PKUMUX and I can hear the PKUMUX click so I know that is doing something. Here are my questions now: 1) What is the possibility that the PKUMUX is bad? Could I have bricked it by trying to program so many times? Should I get a replacement PKUMUX and try to program again? 2) Since I have 3 factory keys (one with damaged teeth) could I use a coffin box with the damaged key? Would I still need the PKUMUX? I would like to get this resolved the easiest way possible and without having to redo all the wiring between the R/S and PKUMUX if possible.

OK, I did some more testing after watching some youtube videos on programming additional keys for the van. It seems that step 7 of the PKUMUX programming is incorrect. The directions from xpresskit says to turn the key without computer to IGN position after grounding the Blue/White wire. The videos I watch shows the key in the ON postion. With the key only in the IGN position the instrument panel does not activate and therefore no security light, etc. So, just to clarify I have retried all combinations of the 3 keys I have while turning the key to the ON position for step 7 and still no luck. The security light just keeps blinking and does not go solid for 3 seconds and chime to notify of a successful program. I also tried placing the antenna loop around the plastic receiver ring at the ignition as well. Still did not program the PKUMUX. I also tested the PKUMUX by grounding the Blue/White wire while the key is in the IGN position and I do not get a click from the PKUMUX. That only happens with the key in the ON position.

Looks like you covered all the bases. Not sure exactly what the issue is. I have added blank chipped keys to those minivans and then used a 556UW to handle the bypass before but when iDatalink came out with their Data solution that programs with just one working ignition key I never messed with them again.Soldering is fun!

kreg, In your opinion what is my best route at this point? I do not really want to undo all the work I have already done if possible. But it seems at this point I am not going to get it to work with what I have. Do you think I should get a replacement PKUMUX and see if I can get it to program from my keys? Also, if I do get a replacement PKUMUX and it does not program for whatever reason what options do I have at that point? Thanks for all your help so far, my wife and I really appreciate it!!!

Personally, time is money. Getting another PKUMUX is like throwing good money after bad and you might end up at the same point. While it will be a bit of work to wire in a new / different bypass module, the ability to program it with one key and the reliability of a Data Type bypass makes sense. If you can get an FLCAN flashed with the correct firmware, FLC-AL(DL)-CH6, you would be way ahead. Soldering is fun!