Losing all electronics?
 

Please help as I don't want to get ripped off when I take this 2004 Concorde to the mechanic. I bought the car a week ago! All worked fine. Then I lost the power windows. Then the radio.....then the power locks and god knows what else. The strangest thing....the windows will work for 3 seconds the minute you start the car then stop. The radio and power locks went a few days later. I plugged in a Bluetooth radio transmitter into the lighter (which really needs wiggling to work) when I got the car. Could that have something to do with messing up the electrical system?? Wipers are currently working. I also have a left headlight out but I don't think it's related! Any help is appreciated!
Thanks,
Lito