Please helppp 2000 catera when I got her I was told they put a new engine in and it needed reprogrammed for the radio to work. Thinking this would be very expensive I didn't bother. Then it started raining and I turned the wipers on high and boom raradio and interior lights worked. So I googled and found k134 got on from junk yard and replaced it. No change I pulled the box apart to see if it needed sod dered but it looks fine as much as I can tell please help