Hmmm… it’s hard to say — it may be so simple as the encoder motor signal lines staying corroded/ruined (Check out the schematics in the initial submit), or it may be the transfer circumstance itself. If your lights perform as they need to, then this tells me the 4WD process is participating, executing what it should. I suspect the transfer scenario just isn't shifting adequately. As I claimed to a poster above, it may be time to own your transfer case checked by a tranny store.
You are going to have to present me some more info — like what, exclusively, ended up you carrying out when you obtained the services light to head out? Exactly what is the program executing now, if nearly anything? Have you ever checked All of your fuses (even the ones underneath the hood?). Did you look for corrosion on within the TCCM?
I don’t want to provide you with any terrible information, but it really Seems similar to what I just went as a result of… and it was the Transfer Circumstance that required assistance… poorly. My Blazer in all probability only has ten-fifteen several hours to the 4WD process, but the “forks” inside the TC have been poorly worn and allowing for my gears to float, which produced indications like you explain (between Other folks).
Once your toes strike one thing on the appropriate… you have discovered the kick panel! This panel is snapped on, however it does hook less than two or three other plastic panels, so be a little bit cautious with it.
Many thanks for finding my account Performing. I still can’t find out ways to add a picture. In any case, wonderful site, quite informative. Like most right here, I’m possessing a problem with my 4wd on my 2000 Blazer. I feel it has some thing to complete While using the vaccum, but I’m unsure (been far too cold out doorways to actually go into searching). Absolutely sure wish I could find a vacuum schematic.
Unfortunately, I have not encountered what you're describing and may only offer you advise for things that I, personally, have accomplished as I'm not a mechanic. I don't know what this pin is, or how much it should really shift.
Very well, that’s one which I haven’t read still. The “ATS” fuse (which is marked “ATC” on this schematic) supplies 12VDC to two substantial orange wires in the TCCM (marked as pins C18 and C19 about the schematic). As I claimed, I haven’t observed this issue in advance of, so I haven’t traced that Portion of the procedure. I can only presume (yeah, I understand!) that the simply because these wires offer 12VDC, they are utilized to run heavier things such as the encoder motor (5VDC, which happens to be The sunshine guage orange wire, is useful for logic — ie. to run the “chips” on the circuit board). Hopefully, you may see in which I’m going using this. I’m just trying to consider it logically — If your fuse is blowing that supplies 12VDC, what during the 4WD technique would use 12VDC?
I've a 2003 chevy blazer and possess no generate towards the front axle. After i press the buttons the tccm clicks, the buttons light-weight and keep lit you may below the motor on transfer situation operate (for a brief time) and no ability to front axle.
Sherry suggests: September 22, 2008 at 3:fifteen pm I actually would like I found your weblog before I replaced my tccm. I are in Canada and my 4wd stopped Operating. I've a 2003 blazer and in which I Stay 4wd is really an absolute need to. I took it to your store and they could not work out the situation, so then I took it for the dreaded seller. They gave me a quote of $1800.00 to interchange my encoder motor and transfer circumstance Manage module. I undoubtedly could not afford this so I took Go To THIS Web-Site the estimate and found the areas on ebay, then I took it to the primary store and compensated them $200 to set up everything.
Greg says: December 19, 2007 at one:22 pm Many thanks for the extra ideas. I wound up just having it in to your store for the reason that I used to be in about my head at the time I acquired outside of seeing the shaft turning and the need was urgent (truck doesn’t drive truly worth a darn in ANY volume of snow w/o 4wd).
The grey with black stripe wire (GRY/BLK) at pin 5 may be the 4Hi signal wire — when urgent the 4Hi button, this wire should go sizzling (I haven’t check the wire, so I’m not sure if it’s making use of logic concentrations (+5VDC) or battery electric power (+12VDC) — In either case, it should be very hot when the button is pressed.
I’m not absolutely certain what causes the lights to easily blink and then not go into equipment. The very first time I put the Blazer in 4Hi this winter, it did just that…. I had to put it in neutral for it to go into 4Hi. Given that then, it will shift on-the-fly. Why? I don’t know. There must be sensors possibly from the TC or perhaps the encoder motor to Permit it know when it's got reached it’s meant manner… I’d suspect it’s Section of the encoder motor, but I’m just guessing.
Upon speaking to a few yards, they apparently consider these modules out ($$$$$$$) and simply Slash the connector off and sell it With all the module. So, that basically only leaves me to a scrap yard that lets you walk all around… and haven’t taken off the module… don’t wanna go there.
What it appears like, to me, is a wiring trouble — most certainly between the encoder and also the TCCM (underneath the kick panel). Have you ever pulled the kick panel and experienced a consider the TCCM wiring (as pictured int he first submit of the web site entry)?