As for the answer for your issue — sorry, I don’t possess the foggiest as my Blazer doesn’t possess the “Auto” aspect. Ya gotta individual one of these extravagant vehicles! You know what I’d say although? If it ain’t broke, don’t touch it! Many thanks for the reviews!
So, you’re declaring the lights Usually do not flash when hoping to have interaction 4Hi? That’s slightly unique, with a pair additional smaller issues to check given that the lights really should flash When the TCCM is receiving the signal.
The encoder motor may be undesirable. In any case, if worse comes to worst, you are able to unscrew the encoder module and manually shift the transfer case into any method you wish. Sadly, I'm able to’t inform you which way is which — you’ll have to determine that out with trial and mistake! Don’t stress, it is possible to’t hurt something — you’ll either be in two wheel travel, or one of many four wheel ranges. If it’s not two wheel, consider yet again right until it is! (There'll be steel “tab”, for absence of better phrases to explain it, protruding of the transfer scenario — put a wrench on it and it really should transfer with nominal work. In no way FORCE Anything at all! Choose it to get a travel and see That which you’re in. With any luck ,, you’ll get it on the 1st try!
Greg states: November 27, 2007 at twelve:51 am Thanks for The nice tips. I used to be able to figure out several of your more simple guidelines and validate that my entrance drive shaft is popping while in 4wd although not in 2wd. Thus far so fantastic (it seems to me), so I’m investigating employing my newfound understanding re.
We now have 4WD. My spouse is impressed with me and my hat is off to you personally sir. You saved us big time. Will gladly fund your retirement account for what you've saved us. Let me know the way.
If you don’t head, I'd greatly love to put up your reviews — if you wish, I am able to depart your name out — not surprisingly, the choice is yours and I will respect any determination you make, just allow me to know.
When you hear clicking going into 4Lo, but not coming out (to 2Hi or 4Hi), then You might also Use a bad relay within the TCCM. Alternative with the TCCM will be required (Until you would like to consider it to an electronics male who might be able to exchange the relay for you).
I'd Examine your Massive orange wires as you will be finding +5VDC logic as the lights are coming on about the sprint. The +12VDC is used for the encoder motor — Look at to be sure to have +12VDC at each the massive orange wires (they are proper beside each other… and There's two large black wires beside them that happen to be floor). Notes: All black wires are ground — all orange wires are electric power (very hot). You will find there's 10A fuse (#fifteen) with the 4WD system, situated in the fuse panel. There is a 20A fuse, located under the hood, that's also for the 4WD method (I’ll must look up the fuse number). The 4WD method also pulls in the 10A courtesy lamp fuse (#ten).
OK, the module site — I'm able to’t seriously explain it better than I did for the last remark poster, but just in case you missed that portion… sit during the passenger seat — swing your ideal foot backwards and forwards although maintaining your heel on the floor — you’ll hit your remaining foot one way, plus the plastic panel where the module is found the opposite way. Some older pickup vans experienced a “vent” pull manage located there, if that assists! As for your chilly producing the challenge — may be. That’s the trouble — there are plenty of points it could be. There exists, what is named an “encoder module”, over the side in the transfer case that controls which mode you will be in (two, 4HI, 4LO) — if drinking water acquired in there and froze, it may be blocking the encoder from transforming modes.
The trouble is After i attempt to go up my hill on a snow coated road the one tires that engage will be the rear. I can listen to the hardware alter beneath the truck in between 2H, 4H & 4L – though the front axel(s?
GM contains a Try THESE Guys Out design and style flaw Within this specific transfer case — the “forks” experienced plastic bushing that should use out and allow the gears in the TC float, and will not likely pull the gears into their right positions.
If by unplugging the TCCM you hope to that the car or truck will default to 2WD — it gained’t. Provided that it’s basically Doing work and driving your axle(s), go away it be and obtain it into a mechanic ASAP.
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I cleaned the TCCM contacts, then was capable to listen to it click, but alas, the 4 HI and 4 LO lights flashed Once i attempted to interact them. Rats! Step two, checked all of the fuses.. All OK, then found a damaged actuator vacume tube damaged near the actator alone.