I have a 1988 Cheyenne 1500 4.3v6. It's not getting any spark. I have already replaced the distributor, the ICM, and the coil. Also, half of my fuse panel isn't getting any power, which very well could be the reason for the no spark. Short story on how it happened. I was at my buddies house and it started up and ran fine. I turned it off and went inside, came back outside like 10 minutes later and she wouldn't start. It's getting fuel, just no spark. I've run out of ideas to troubleshoot and need help. Thanks.