Sherry states: September 22, 2008 at three:fifteen pm I actually desire I discovered your web site prior to I changed my tccm. I live in Canada and my 4wd stopped Performing. I have a 2003 blazer and where I Stay 4wd is undoubtedly an absolute ought to. I took it to your store and they might not find out the problem, so then I took it on the dreaded supplier. They gave me a quotation of $1800.00 to switch my encoder motor and transfer scenario Manage module. I absolutely could not pay for this so I took the estimate and located the parts on ebay, then I took it to the 1st store and paid them $200 to setup everything.
Are you able to notify me what my problem is and whether it is a straightforward restore? I listen to no sound when I am pushing the button, just the lights blink and afterwards return to 2hi. Can any one aid me?
The main issue it is possible to check oneself. Get the schematics from the 1st publish and examination pins 26 via 29 for logic electricity (+5VDC), applying pin 16 as your floor. You may also would like to get underneath the car and examination precisely the same wires with the encoder motor. Take a look at the bottom wire there at the same time.
Hmmm… doesn’t audio just like a TCCM challenge… sounds extra like an encoder motor difficulty, or probably a transfer scenario dilemma.
As I have stated persistently within the a few webpages of the post… almost everything which i understand about the Chevy 4WD process is posted below. I haven't any more information to offer. I'm not a mechanic.
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Put a test direct (volt meter) over the output from the 4Lo button… when you press 4 Lo, does the meter reveal that there is energy leaving the button? (It must, if what I'm looking through Here's right… and I’m studying it appropriately.) Now, do precisely the same for 4Hi (do each exams in park) — does it output similar to 4Lo? Otherwise, you could possibly desire to examine the harness on the buttons a little bit more diligently first, and afterwards check out implementing electric power into the output aspect of your 4Hi button (the identical degree given that the output from 4Lo, irrespective of whether it's +12VDC or +5VDC… I’m contemplating it ought to be +12VDC although).
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You aren’t obtaining any flashing in the lights in any respect (if you test to interact 4WD)? There need to only be one light-weight on at any given time (indicating which range you happen to be in) — a number of lights really should flash any time you test to have interaction 4WD (either Hello or Lo). If you try to have interaction 4WD as well as lights do not alter (ie. no flashing), I would suspect a difficulty with possibly the wiring into the TCCM or the TCCM alone is undesirable.
Regrettably, it’s been Just about nine a long time considering that I marketed my Blazer and also have no additional facts for yourself other that what has Beforehand been posted below.
This may or could not be connected with your dilemma, but another thing I am able to let you know is to acquire it checked out ASAP.
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I’m not absolutely absolutely sure what brings about the lights to easily blink and afterwards not go into equipment. The very first time I put the Blazer in 4Hi this Wintertime, it did just that…. I had to place it in neutral for it to enter 4Hi. Considering that then, it is going to change on-the-fly. Why? I don’t know. There must be sensors possibly within the TC or perhaps the encoder motor to let it know when it's achieved it’s meant mode… I’d suspect it’s A part of the encoder motor, but I’m just guessing.