denes claims: June 8, 2008 at four: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 contact “cooks out” inside the encoder motor confimation switches. Just so you recognize, the A,B, and C switches inform the TCCM what basic change postion they’re in. the P switch is a singal into the TCCM when to stop the motor (final park postion). I am rather confident A is 2wd, B is 4wd hi, and C is 4wd very low. If you’re a little bit clever w/ electronics, You may as well deal with the TCCM difficulties w/ new relays.
To start with, I apologize with the hold off in responding — I'd a nuts couple of months about the vacations and didn’t do Substantially running a blog.
Argggg.. Could it's the cold? It has been beneath freezing for 2 months now and to compound The problem I have no heat either in the car or truck.
I most likely saved hundreds if I would have long gone to a supplier. I might have accomplished the perform myself, but I would not have a elevate Which small component was a ache to obtain, as well as get it out for that matter.
Effectively, that’s about all I can visualize at this moment — if I visualize the rest, I’ll update this article.
Hmmm… my very first believed is that it is a wiring challenge. Why? Simply because you are able to demonstrate the process performs by Placing it into 4Lo. If you can find the system into 4Lo, that tells me the TCCM is Performing (or at the least the 4Lo portion is), the encoder motor is working, and the vacuum is working (the entrance hub is partaking — the vacuum swap and diaphram are Doing work). I’d Look at the wires tend to be the TCCM first, then probably the encoder motor subsequent.
That’s brilliant! Properly, I think you’ll go ahead and take cake — I don’t Imagine we’re going to see a restore for virtually any below 75 cents! Superior work!
Perfectly, do what you can and let me know — and I’ll do my greatest that can assist you by means of it — I’d choose to see you correct it far too! Regards;
In case you hear the clicking from the TCCM, that Click Here To Investigate tells you which the relays are Functioning and try To place the encoder motor in gear. There are various explanations for this to happen, broken/leaking vacuum traces to start out. The encoder motor wires could be poor. There's a “plastic bushing” that keeps a “fork” in the transfer situation while in the situation (very well, the fork retains the gears in the correct place)… if the plastic bushing is worn, it can cause the transfer situation to not switch (this occurred to me, although the symptoms ended up which the procedure would switch to 4Hi/4Lo, that has a significant clunk, and it was quite challenging to have it back away from 4WD.)
Minimize a measuring triangle. Have a piece of stiff cardboard or Wooden and Minimize it into a wonderful ideal triangle (a single by using a 90 diploma angle) that is the exact same top as your wheels.
The gray with black stripe wire (GRY/BLK) at pin 5 will be the 4Hi signal wire — when pressing the 4Hi button, this wire really should go hot (I haven’t examination the wire, so I’m not sure if it’s working with logic levels (+5VDC) or battery energy (+12VDC) — In any case, it ought to be sizzling if the button is pressed.
Rudy states: March 24, 2008 at three:38 pm I'm getting an issue with my 4WD not heading into 4HI, I push the button and very little takes place. I set the truck in neutral and hit 4LO it goes in, then I push 2HI and it goes again. After i have it in neutral and push 4HI both 4HI and 4LO lights flash after which goes back to 2HI. I go through that if you jumper pin thirteen on the data website link cable to floor, then flip important for the ON place the lights about the 4WD buttons flash a code, so I attempted it and certain more than enough a code of 2 flashed indicating motor/encoder failure.
I don’t have every one of the terminology, or determine what each of the sections are — but I will help you While using the routing in the strains! The large black plastic point you see IN the motorists side fender seems to become a vacuum canister — whether strains appear off it Within the fender, I have no idea.
Sadly, I’m not likely the man that can assist you Using the vacuum line as I’ve hardly ever experienced any issues with the vacuum and haven’t experienced the necessity to trace hoses. You might want to Check out this publish to see if it might be of any support to you.