A lot has happened since my last post.
I am 99 per cent sure the bcm is the culprit. I know you recommended a new one, but my budget can't reach it. I bought a used one with the same part number from a van with just 77,000 miles on it. I didn't install it, but took it to the dealer for programming and installation.
OK, here's the situation. I had previously seperated the bcm from the fuse box during the process of looking for the twisted pairs you wanted me to test. I never reconnected it, just left it hooked up to the lower wire connectors, but unplugged from the back of the fusebox. The van ran fine without it so I thought I'd save the dealer the time of removal.
He only had it in the shop fifteen minutes and came out telling me, "bus failure". He said, I would have to bring it back another day and leave it for an extensive process of finding a loose connection or bad wire that was causing the bus failure. Some techs give you a good feeling, this guy didn't give me a good feeling.
Is it possible the unplugged bcm caused the bus failure? I mean, I'm no tech but when I reinstalled the original bcm and took it to Advanced auto they read the codes fine. It said, "no codes", not, "bus failure". I was honestly waiting for the girl at Advanced to shake her head and tell me she couldn't get a reading. You should have seen the look on my face when she said "no codes". I was puzzled. She thought I didn't believe her because she was female and stuck the reading in my face so I could see it for myself.
Well, ok, there is the answer to an original question you had, there are no codes in the computer. At least, not from the Advanced auto reader.
OK, here's my dilemna, I'm dying to find out if this bcm will solve my dash cluster issues but I don't want to risk messing it up installing it without programming it first.
I don't know if I have to reprogram the bcm I purchased before I install it, or if it can be programmed after I install it.
I understand that the odometer reading is stored in the bcm. Will the dealer be able to recover the original odometer reading from the van and program it into the one I purchased so the van will have actual milage recorded?
Ok, there is one more issue I want your opinion on. The dash lights flicker constantly could this be from a faulty bcm as well?
Thanks, I appreciate your help.