Hmmm… it’s hard to say — it could be so simple as the encoder motor sign traces staying corroded/damaged (Examine the schematics in the primary put up), or it could be the transfer case alone. When the lights function as they ought to, then this tells me the 4WD program is engaging, accomplishing what it need to. I suspect the transfer case just isn't shifting correctly. As I said to a poster previously mentioned, it may be time to have your transfer circumstance checked by a tranny store.
One thing you can Test swiftly is to lay down beside the automobile and possess an individual Bit by bit generate ahead (when in 4WD)… you’re seeking to see In the event the driveshaft through the TC to the front diff is actually turning. Whether it is, the situation is ahead of that (ie. front diff), Otherwise, the issue is in the TC.
As for The interior workings with the transfer scenario, I leave that to the pros so I can’t reply that concern both.
You must perform some even more investigation to deliver more details — there’s a myriad of factors to test posted higher than.
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Not surprisingly, I am able to’t promise This really is your trouble, Specifically over the internet, and I hope it isn’t — but I might have it checked out skillfully.
i put it in park, and again nothing. the sole way to engage it (no buttons flashing in the least when in park or travel) is To place it in neutral, and again only will go into 4low.
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Sherry says: September 22, 2008 at three:15 pm I really desire I found your weblog in advance of I changed my tccm. I are in Canada and my 4wd stopped working. I have a 2003 blazer and in which I Are living 4wd is definitely an absolute will have to. I took it into a store and they could not figure out the trouble, so then I took it into the dreaded supplier. They gave me a quotation of $1800.00 to interchange my encoder motor and transfer situation Command module. I absolutely could not afford to pay for this so I took the estimate and found the parts on ebay, then I took it to the main store and paid out them $two hundred to put in almost everything.
As Go To THIS Web-Site I explained to some past poster, if you want to go into it, get rid of the encoder motor from the TC then check out to engage the assorted generate modes — and view the motor to be sure it’s relocating in the two Instructions (it need to arrive at a halt in 3 distinct positions, with the three drive modes — mark the place it is actually when You begin so you're able to set it back again there if all else fails!
However, I'm able to’t give you a definitive answer on your dilemma, but when I had to convey, I’d appear somewhere else, aside from your TCCM (encoder or transfer scenario)… but however, I’m not a mechanic either… so I'm just guessing!
If by unplugging the TCCM you hope to the motor vehicle will default to 2WD — it gained’t. Providing it’s essentially Performing and driving your axle(s), go away or not it's and acquire it to some mechanic ASAP.
two) the vacuum change also communicates Together with the TCCM — no vacuum and your lights will most likely flash regularly while trying to engage 4wd, but gained’t engage right up until all 4wd parts, Again, communicate with one another.
Just a quick Observe… In the event your system only engages fifty percent way and kicks out, it can be a result of “plastic” bushings from the transfer scenario that don out.