Radio

I own a 1995 ford contour, manual, 2.5. I had some wiring done before the safty and every thing worked rite. After its safty I had no radio nor interior over head lites and the clock comes on and off. When the clock does that it resets its self. I have asked the person that did the wiring and it was all working ok them. Asked the place that saftied it and they do not know but are more then happy to look at it with a price. What could it be? Help. I have owned this car for just over a month and do love it but it seems to be becoming a pain. Thank you