I have a 2004 Kia Sorento, that I purchased this past Nov. About a month ago, while driving down the road, my radio, controls for the radio on steering wheel, clock and rear windshield wiper, stopped working. Haven't been on since. That same day, I noticed that my locks will not open with the key fob, but the locks will work when the car is ON, and the dome light will not come on unless the car is ON. Someone told me that one of the diodes could be the problem and need replaced. Can anyone tell me if this is true, or is it a number of things going wrong to make it seem like 1 big problem???