Left my 2004 "6" 6 cyl with 135,000 miles sit for a few days while working from home and now it wont start. A bit of history. Right turn signal works about half the time. I have heard excessive engine noise through speakers but only two or three times. A few times the lights were out on the stereo like it was off but would not turn off or on. Today. Went out to start it and it acted like the battery was dead. Unlock with key and tried to start. Nothing. Straight up nothing. Hooked up to jumper cables and it started to charge but would not start. Just clicking but the dash lights looked correct. When I turned the key off the gauges started jumping around like crazy. All gauges going crazy. Any idea where this issue might be located. Sounds like a short of some type.