Originally Posted by 2005JGC
does the odometer say "no bus" when its freaking out? I have seen some weird no run, no cluster function no bus issues that were actually the pcm... try disconnecting all the connectors at the pcm (battery disconnected) and spray some electrical contact cleaner on the pins and plug em back in... if it works after doing this your problem is likely a loose pin in the pcm... but obviously drive it for a bit and verify it isnt 100% fixed before replacing the pcm because it may just be a connection.
I have heard of water intrusion dripping down onto the bcm on some wj's... never personally seen it but I have heard of it and that can cause some really weird symptoms with water intrusion into a module
I have yet to see it say "No Bus", I've read about it, but mine has displayed that.
Also I have done a lot of cleaning at the PCM pins, and have cleaned the battery terminals also both multiple times.
And I'm about cinvinced it is a BCM issue myself, I can get one at a junk yard but would that help me, I would still have to find a DRB-III or convince a stealership to reprogram my junk yard BCM.
Also has anyone had to pay the dealership to replace a BCM, just wanna know approximate cost $$$$$$