Great thanks Ed you have been a ton of help.
Ok I'm going to give it a run tommorrow. I saw the PCM while messing around under the hood earlier and even disconntected and reconnected it to see if it fixed the promblem....nope. So I at least know where to start. Will let you know how it goes.
I have not had a chance to look at my van until today. Horrible weather here in GA every weekend until today. Anyway things all checked out fine until I got to checking between A4 and B31 for continuity...it didn't change the meter at all. When I checked between A4 and A17 it went to 581...same after several checks. So that being said there must be a problem between A4 and B31 right???? Now what do you suggest? Thanks so much.
MattyPS I did disconnect battery a few days ago and the van ran for a while sitting in the driveway (about 15 minutes and I turned it off). My wife tried to drive it the next day and got a couple miles down road to my moms just fine. Then my dad had to disconnect battery again to get it to start for her to come home. The van sat for several days and she went out a couple days ago just to see if it would start and it did. Don't know what all this means either. But thought it might be helpful info to have.
I took that transmission plug off...no evidence of bare or shorted wires. I found no evidence of an outside grounding source when checking continuity to battery neg btwn A17 and B31. Now you mentioned: I think we need to catch it in a non-running state and check the A17 and B31 voltages directly with the PCM connected. That means poking a hole in the B31 wire but you can unplug any of the under hood sensors to get at the A17 feed if you'd prefer.I'm wondering if the B31 really is being shorted to ground and taking the PCM down. If when you check these circuits you find something less than 5.15v, turn the key off and recheck your circuits for resistance like before......
How do I go about knowing which is the B31 wire to poke a hole in? Also what sensors to get to A17 feed? Sorry some of this is still a little confusing.
Also in the first e-mail you sent about all the tests you mentioned: Other tests you can do while the engine is NOT in running condition are to test your 5v feed right at one of the sensors with everything plugged in and key on. This orange wire will typically show 5.18v when healthy and about a tenth that (0.5v) when the PCM isn't feeling so good. This is done on the 20vDC scale.....
Which orange wire am I looking for and where do I find it?
I can't thank you enough for this help. How do I add money to what I have paid you. I have a tight budget (obviously or I wouldn't be wandering lost under my hood) but I want to get you some more funds for your help.