I hate this Jeep at times. For work I had to drive down to Huntsville, AL from Indiana. I get about 2 hours away and as I'm pulling out of the gas station I hear a bunch of clicking and dinging. I look down and my gauge cluster is going crazy. The needles are flicking up and down, the lights are going on and off, and the odometer is flashing on/off. After about 10 seconds everything returns to normal except the ABS and parking brake lights remain illuminated. As I'm driving, I notice that the voltage gauge is fluctuating up and down (see video, sorry it's bad I just pointed and left it there without looking while I was concentrating on driving).
So as it's getting later and towards dusk I turn my lights on. That results in the tachometer and speedometer going to zero and some more clicking and lights. I'm not sure if it caused the Jeep to die or if it was just the tachometer, but I immediately turned the lights back off and everything kept running. Now the brake and ABS lights were flashing at me and the speedometer stayed at zero. When I came to a quick stop, everything went back to normal driving. I was too afraid to turn on the lights or turn off the Jeep so I made it to my hotel and parked it.
After I parked I turned on the lights.....worked fine. So I turned the Jeep off and then back on. Now it started throwing a code and wouldn't idle w/out a little gas; P0505 bad IAC. But I'm not convinced it's a bad IAC because something else is clearly going on here. I came back about 1 hour later and the Jeep started up like normal and ran like normal (idled just fine).
Tomorrow I'm planning on taking it to Autozone so they can test the alternator and battery. If those test good, any ideas? Some searching seems like it might be a PCM going bad. Apparently you can buy them pre-programmed online for under $200. But since I'm not at home I'm sure I'll pay out the ass from the dealership.
*EDIT* Forgot the link: http://s184.photobucket.com/user/Pwr...tml?sort=3&o=0