Hmmm… it’s not easy to say — it may be so simple as the encoder motor sign traces becoming corroded/weakened (Test the schematics in the main write-up), or it could be the transfer case itself. When the lights do the job as they ought to, then this tells me the 4WD method is engaging, executing what it must. I believe the transfer situation just isn't shifting correctly. As I mentioned to the poster over, it could be time to get your transfer case checked by a tranny store.
guaranteed plenty of the vacume line was lousy through the valve deal with. I very first transformed the vacume turn on the transfer scenario but it had been only $sixteen and I hardly ever have to bother with it once again. So for $26, and the wide information on this weblog, I spent about 2 several hours to acquire it working. Can’t thank you more than enough.
I don’t want to provide you with any poor news, nevertheless it Appears very similar to what I just went via… and it had been the Transfer Circumstance that needed service… badly. My Blazer in all probability only has 10-15 hours on the 4WD system, still the “forks” In the TC ended up terribly worn and letting my gears to drift, which produced indicators like you describe (between others).
The TCCM is Performing, the encoder motor is working, the front, ideal axle is engaging, along with your vacuum strains are Operating (you will discover extra, but these are definitely the important types). The trick below are going to be to determine what is 4Hi dependent, and why it received’t kick into 4Hi.
Have a look at the schematic “front axel switch & pcm.jpg” — then have Yet another think about the wires over the TCCM (Transfer Scenario Manage Module), Positioned underneath the travellers kick panel.
That’s odd that The sunshine will come on right away, with no flashing and without engaging the 4WD. The stable gentle approaching at 4Hi is usually an indication which the technique is practical.
I’m intending to e-mail you, as I would like to receive a maintain of one's diagram — with any luck , you’ll let me submit it here to save lots of men and women a while (and you simply from being forced to e-mail it out to person people all the time).
Buffalo, eh? I listen to you — I’m just north of you in Ontario, Canada. You guys been finding pelted this week far too? We received eight inches yesterday, which started off close to 2:00pm — just in time for that drive home.
I ment to say, I had my transmission rebuilt 2 months back as well as 4wd worked then. I place my Blazer on jack stands and started tracing the hissing sound (air leaking?). I’ve discoverd the hissing noise is coming from your transfer situation.
What You must do is take out the battery after which you can the battery holder — and you will then begin to see the vacuum diaphram for that 4WD system. The battery cables are fairly small, so I taken out the battery fully to work on the system, then set it back in on it’s side to test it (but don’t go away it like this for extensive — it can leak!). When you start the car or truck, and have interaction the 4WD process, vacuum will pull this diaphram closed and engage the front, proper Going Here hub. So, begin the vehicle and check out To place it in 4WD — check out the diaphram and see what comes about.
Moreover that, you’d know when you were in 4WD or not. Like you stated, park within the mud — set it in 2Hi and check out to receive out. Then place it in 4Hi and do the same. There ought to be quite the differenc in feeling between The 2 modes in mud. When there is not, a take a look at to your local mechanic is in order.
goes into shop this week..just questioning whether it is a linkage of some type? maybe u joint? The lights reveals which the transform into 4Hi is comprehensive and four auto also..but just no traction from entrance wheels..it's possible a transfer circumstance issue?
2) the vacuum switch also communicates While using the TCCM — no vacuum and also your lights will most likely flash constantly though making an attempt to interact 4wd, but received’t have interaction until finally all 4wd factors, Once more, communicate with one another.
Sad to say, it’s been almost nine several years considering that I bought my Blazer and have no further information and facts for you personally other that what has Formerly been posted right here.