Bad wire connection through doors?

Absolutely, but to have both quit at the same time is odd. Pull the rubber boot back on the driver's side door and check the wires to see if they're frayed or broken.

@ the back of the radio get th to wires that feed one door speaker and make the wire ends touch the - and + ends of a 9. Volt battery. If the speaker and the wireing are good you will hear the speaker poping from the 9 volt battery.

That's not going to work if the car has the Infinity system. Those have little amps bolted right to the speakers. They are REAL expensive and high-quality speakers but they need a ground wire and 12 volt feed wire besides the two speaker wires.

Most radios have two output ICs, one for the left side and one for the right, but Chrysler did have a few models where one was for the front and one for the rear pair of speakers. The door and dash speakers are all considered "front" speakers so if the dash ones work, the radio should be working. It's real rare to burn out one speaker let alone two, but they can become distorted. If there's no sound at all, I'd suspect wiring first, two bad speakers second.