Hoping someone on here can help me? Have an old Saturn that needed a frequency counter. Located one that was working for a fair price, but didnt work when I hooked it up to the radio. Have since noticed that the cable was plugged in backwards at the channel display/frequency counter. Which explains why the original counter was missing. At this point I want to pull my hair out. I have since corrected the cable issue, but obviously something must have shorted. I'm not getting correct voltage at the 7808 regulator and have tried replacing it, d603, and all the electrolytic caps. Hopefully it's repairable. Anyone in this forum willing to help? Thanks in advance!