the FOBs that you purchased were likely programmed to another vehicle at one time & most times a pre programmed FOB chip can't be reprogrammed for a different vehicle
That is why i always suggest that when you buy FOBs from places like eBay, Craigslist, Kijiji, etc.
buy FOB that are sold as new in the package
not ones that use words like
New Never Used
Like New
etc.
even if a person could completely erase the memory on the chip, how would a person format the erased chip to receive new programming, or does it have to be formatted :4-dontknow:
I suggest that you look at IKEYLESS or other places like it
they only sell brand new FOBs & they get them from the same place that Chrysler does & they cost about 50 - 60 % less then at a dealership, but they still have to be programmed to your vehicle
sometimes hardware stores like ACE or certain Locksmiths have the tool to program it, otherwise you have to have the dealership do it