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The encoder motor is also terrible. In any case, if even worse relates to worst, it is possible to unscrew the encoder module and manually shift the transfer circumstance into any manner you wish. Regretably, I'm able to’t tell you which way is which — you’ll really have to figure that out with trial and mistake! Don’t be concerned, it is possible to’t damage everything — you’ll both be in 2 wheel push, or on the list of 4 wheel ranges. If it’s not two wheel, check out once again till it truly is! (There'll be steel “tab”, for deficiency of better words and phrases to explain it, sticking out with the transfer case — set a wrench on it and it must go with minimum energy. In no way Drive Everything! Take it for the generate and find out what you’re in. With any luck ,, you’ll get it on the very first consider!

I can not present any even further advise other than what I've presently posted below. I got rid of my Blazer in 2007.

Quantity 7 is the culpret in two on the blazers I've worked on its hardned metal so don't attempt to make a person from any washer it is going to fail. GM sells this washer in what they get in touch with a washer kit it contains seven, 20, and 24. If any individual has this issue its a simple take care of and you simply dont even have to remove the diff, just the axle tube, but youll have to remove the halfshaft 1st this fix took me just around an hour to complete.

If there isn't any connector, like I describe, then you will need Yet another list of schematics, and somebody knowledgeable about that program.

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My two wheel drive would engage although not my four. I read about the tccm and also the vaccum swap and also to my particular amazement the vaccum line experienced broken from the change. I fastened this concern and now my 4 wheel travel is Doing work all over again. The info you posted saved me a trip to the dealer!!!

What it sounds like, to me, can be a wiring difficulty — probably involving the encoder along with the TCCM (beneath the kick panel). Have you pulled the kick panel and had a consider the TCCM wiring (as pictured int he very first submit of the web site entry)?

If you DO NOT listen to the “simply click-click on”, you have a bad relay from the TCCM. The excellent news — you can get a substitution relay at your neighborhood electronics retail outlet and exchange it in the TCCM. You will require a soldering iron and a few essential electronics abilities, but it is rather conveniently achieved (two or three points to unsolder after which you can resolder the new relay in position).

What it feels like is you could have an encoder motor problem — This is actually the motor about the aspect of your Transfer Situation that controls the shifting of the varied “modes” (2Hi, 4Hi & 4Lo).

Very well, that’s one which I Browse Around This Web-site haven’t read nonetheless. The “ATS” fuse (and that is marked “ATC” on this schematic) provides 12VDC to two substantial orange wires within the TCCM (marked as pins C18 and C19 within the schematic). As I mentioned, I haven’t noticed this issue before, so I haven’t traced that Component of the procedure. I am able to only presume (yeah, I understand!) that the since these wires provide 12VDC, These are accustomed to run heavier factors like the encoder motor (5VDC, which is The sunshine guage orange wire, is utilized for logic — ie. to operate the “chips” around the circuit board). With any luck ,, you'll be able to see where I’m going using this type of. I’m just seeking to think about it logically — If your fuse is blowing that materials 12VDC, what in the 4WD technique would use 12VDC?

Ryan says: April two, 2008 at 9:24 pm Many thanks for your response to my article earlier, And that i had pep boys do a vacuum test about the procedure and they reported just about every factor was seemed to be Okay, so I purchased that four wheel drive swith from napa and installed it,(it went in the front axle suitable where the cable from your actuator attaches), nevertheless no luck. so i could see some type of sensor along with the transfer case with 3 vacuum lines attached to it, so i changed i, and Again nevertheless practically nothing, so i have a few far more thoughts…their is an additional sensor within the tail pice on the transfer case, I used to be informed it is the velocity Regulate sensor, could that be the trouble?

denes states: June eight, 2008 at 4:28 pm The encoder motors usually fall short over the 2002+ autrotrac (4 4wb buttons) blazers and s10 p/u’s. A printed circuit board Get in touch with “cooks out” inside the encoder motor confimation switches. Just so you know, the A,B, and C switches explain to the TCCM what normal change postion they’re in. the P swap is actually a singal into the TCCM when to halt the motor (remaining park postion). I'm quite absolutely sure A is 2wd, B is 4wd Hello, and C is 4wd low. For those who’re a bit intelligent w/ electronics, You may also resolve the TCCM issues w/ new relays.

It Seems far more like “mechanic converse” to me — but who am I? What exactly do they claim to get the situation While using the TCCM? What Component of it truly is lousy?

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