I have 2000 Jeep Cherokee Laredo. #4 flasher fuse has 11 volts on one side and 12 on the other. The flashers and signals work without fuse in bcm. I have been trying to figure the source for weeks. Windows ,door locks, Gage cluster, and multiple other components randomly fail and come back on. I also have .5 - .2 voltage all over in random places that sometimes change as well as the 11 volts on the fuse link sometimes goes to .5 when I'm pulling fuses trying to find the problem. But then later returns to 11. It's like when I start pulling fuses I send the current hiding for a bit. Idk. I don't have a short to ground I believe because of no blown fuses. Did have bad mildly burnt wires going to sensor on transmission bell housing. Find it hoping to stop problem but didn't. Pulled the pcm fuse under hood and asd relay went crazy turning on engine fan, injection system and ac clutch. Still runs fine but did have problems shifting into the proper gear at the right time. Over time from cleaning ground connections and replacing battery wires and ends some of the failures stopped happening. Also added a bit stronger generator originally thinking pcm was reading lower voltage than it wanted. Another thing to know is sentry key light is on when problems are present and when they aren't. I have gotten it to go off a few times unhooking battery for a while trouble shooting issues before I found voltage problems. Also most all wires to blinker switch have 5 volts not the previous .5. I couldn't find if this was correct for the circuit or not just didn't think that was normal. Also got used pcm AKA fuse panel for the Jeep in question. It didn't change anything. Idk if I have wire problem or computer problems or ignition problems. with the random voltage everywhere I'm honestly taking shots in the dark on this one. I'm a little over my head on this one but really need any advice I could get. Thanks for all the past advice and skills I've gained from your you tube channel btw. And for any advice to help me narrow my problems down.
Found two issues haven't had a lot of time. Have been studying automotive electrical though and learned a lot. Okay so I have over 5v about 5.5 on 5v reference circuit. This shouldn't be hard to find with trouble shooting methods I have learned. Then the fun part. Buss voltage problems between .5 and 3.25 fluctuations at driver door and gauge cluster. I don't believe this is correct being I read that it should go between either 5-0 or 7-0. I'll have to go back and double check. Hopefully I have same issue as most with passenger door module. If not I hope I can figure it out with multimeter. The article I read about he used a scope. So wish me luck. I'll update when I hopefully get it fixed.
Sounds like a definite short somewhere
get an ohmeter and test the wiring from the fuse all the way back. somewhere there is a drain and resistance will go up