The transfer scenario Within this automobile is weak — it's got a style flaw in it from your factory. You will find there's “fork” (for deficiency of a far better term) which has a plastic bushing from the TC that wears out and permits the gears to float — mine had been just replaced (the forks happen to be redesigned) with not many hrs on them. The truth is, mine had been worn so lousy the gears had been rubbing the situation and would've rubbed throughout the TC, had I remaining it as is, inside the incredibly near potential.
What it seems like is you'll have an encoder motor dilemma — Here is the motor on the aspect from the Transfer Scenario that controls the shifting of the different “modes” (2Hi, 4Hi & 4Lo).
I found a forum the place a guy experienced a challenge wherever his ninety nine Blazer wouldn't shift to 4HI. When he pushed the 2HI button, The sunshine flashed but practically nothing took place.
Again I hit some obstructions. I had been advised which the clips could almost certainly be observed, Nonetheless they would wish a sample to send off. I’ll keep seeking.
Anyway, skip forward… all went very well previous weekend, but I still had a damaged 4×4 to manage. And, just as if Murphy hasn’t currently performed plenty of, it’s the vacation season and many locations are only open several odd days. That made issues challenging After i found out what I needed to look for!
Certainly, right after changing the TC or the encoder, I would reset the system by disconnecting the battery for one/two hour and after that cycle the ignition from on to off thrice.
I’m intending to e-mail you, as I would like to have a hold of your diagram — hopefully you’ll allow me to publish it here to save lots of people some time (so you from needing to e mail it out to particular person people all the time).
Set a check guide (volt meter) within the output on the 4Lo button… when you push four Lo, does the meter reveal that there's ability leaving the button? (It must, if what I'm examining here is proper… and I’m reading through it correctly.) Now, do precisely the same for 4Hi (do both checks in park) — will it output similar to 4Lo? Otherwise, you might would like to examine the harness in the buttons somewhat more meticulously 1st, and then attempt applying power to the output facet from the 4Hi button (precisely the same degree as being the output from 4Lo, visit their website no matter whether it be +12VDC or +5VDC… I’m imagining it should be +12VDC however).
Alright, the module area — I'm able to’t truly describe it better than I did for the final remark poster, but in the event you missed that aspect… sit while in the passenger seat — swing your proper foot backwards and forwards while retaining your heel on the floor — you’ll hit your remaining foot A technique, along with the plastic panel wherever the module is situated another way. Some older pickup trucks experienced a “vent” pull handle Positioned there, if that assists! As with the cold leading to the issue — can be. That’s the issue — there are such a lot of matters it may be. There is certainly, what is termed an “encoder module”, to the side of the transfer case that controls which manner you happen to be in (two, 4HI, 4LO) — if drinking water acquired in there and froze, it may be blocking the encoder from modifying modes.
It’s doable that the procedure is partaking by itself. Nonetheless, 4WD engages WITH vacuum, not devoid of — appropriately, you'll have a foul vacuum swap and that is permitting vacuum via when it shouldn’t. Now, why the lights are likely out, that is odd. I wouldn’t Imagine the system would “point out” 4WD when it wasn’t bodily put there — that means, In the event the 4WD system DID come about to kick in as a result of vacuum, the TCCM would have not received a sign To place the system into 4WD and therefor would not shift the encoder motor, or turn on the 4WD indicator lights. In case the 4WD process is kicking in as a consequence of vacuum, the one actual detail being impacted can be the entrance axle, which is precisely what is managed via vacuum.
Suggestions? It’s been one thing immediately after another now for 5 a long time….Im so near returning it to chevy…. right thru the front window
System B… I’ll test my neighborhood electronics retail store and find out if I could possibly get a few of the woman ends (steel clips on the tip of each specific wire… you can find about thirty wires, I didn’t basically count).
UPDATED twelve/twelve/07 – I just desired to include to this put up the TCCM has two relays inside that Regulate the actual switching of your encoder motor — you that is definitely That which you listen to “clicking” after you test to interact the 4WD method.
Nevertheless, immediately after fooling around some much more, I found that there was a bad vacuum switch in addition to the transmission guiding the transfer scenario. (I are already wanting to put up pictures.. but it isn’t allowing me.) — see underneath!