Originally Posted by Cougar41
Yup that's from a very old and very long thread posted on another forum years ago. Here's the thread in it's entirety. I'd have to agree with one of the posts. It was likely true for a few early build 3rd gen vans but was soon corrected. I doubt they were taping and stuffing wires years latter in 2003 and over two generations of vans.
That IS the very same thread from which I quoted. I have also seen it referenced elsewhere, and apparently many have gone way beyond what I have spent and ended up with a still "limping" Caravan. I replaced the transmission solenoid pack a year or two ago. Tranny has been fine since then until June 2013. When we returned from the 200+ mile limp back from JFK I replaced the speed sensors but the van remains in limp mode.
I tried clearing the codes to see if the "relearn process" would correct any errors, but van remains in limp mode.
As cv2003 suggests I don't think this van would be worth investing in a new transmission, although I could probably get my friend to do the rebuild and do the R&R myself. But that same friend tells me the wiring issue may be at the root of the problem.
I've taken lots of pictures and both ends of the ground strap are in line for a thorough cleaning and reconnection. There is a lot of plastic tape wrapping the wiring in many locations, so I don't necessarily think the "newness" of my 2003 means I don't have a bad splice in there. I just don't want to rip the entire harness apart, just the part where I'll find the splice.
The linked photos trace the harness from the place where two grounds attach at the bell housing (One is the main battery ground cable) Note dampness where wires enter the harness (arrow)
The second photo shows where the two ground wires enter the harness. It appears to be quite wet (water, not oil) at this spot. shows same spot at photo_1 and expansion into very thick section of harness
The third photo is where the harness has sections coming and going to many other locations. It is very thick and very spongy feeling with lots of electrical tape wrapping it. The arrow points to what looks like the wire coming from one of the speed sensors
The fourth appears to be where the two grounds in photo #1 exit the harness and attach to the battery and the body (fender well) respectively. The thick battery cable has two smaller wires crimped onto the battery connector for a total of four grounds. Is there a way of knowing which ones may be related to the sensors?
Photos are somewhat vague but you can click on "view original photo" and perhaps get a better idea. Where several different segments of the harness come together seems likely to be where the splice is but I can't be sure until I start in with my "scalpel."