Audio Systems: speaker problems, dodge grand caravan, infinity speaker

Question
I have a 1993 dodge Grand Caravan with an Infinity speaker system. A number of years ago the factory installed tape deck stopped working. I purchased a new Jensen (I think) tape deck and was having trouble getting all the speakers to function properly. I recall cutting a few wires by the speakers and everything started working great. After a few more years that tape deck stopped working so I purchased an original chrysler tape deck that was compatible with the original. It also worked fine. Now I purchased (on Ebay) 2 Chrysler tape/cd players and on each one I can't get the frony speakers to work. When I install the non cd player the front speakers work. I am pretty sure that the problem is not with the unit but with the speakers. I still have unconnected cut wires around the speakers but I can't seem to pinpoint the problem. Any ideas?
Thanks
Alan

Answer
fix all the wires plugs back to factory  
on the right side of the radio there are two relays that turn on 4 of the 8 speakers you have in that car the other 4 always run with the radio
and there are 4 amplifiers one behind each speaker
check the relays first
good luck