Truly, I am astonished it engaged just as if I don't forget the right way, the vacuum switch communicates with the TCCM and usually brings about the sprint switches to flash if no interaction is been given. It's been a while considering that I labored on this car even though (and sold it in ’07), so I may be mistaken.
I go through all of the critiques about American automobiles and just like a idiot I purchased this Blazer since it gave the impression of a fantastic offer. I’m nonetheless seeking to determine a few of the electrical problems out. Our excellent automobile corporations considered they have been likely to offer junk eternally and we ended up likely to hold obtaining it. WRONG!!!! This is certainly my final American auto right until a little something improvements. Just this week I junked my Pontiac With all the well-known Quad4 motor that broke a connecting rod 2 times.. A few years in the past I scrapped my Dodge Caravan once the trans mission EXPLODED two times. And that i do imply explode! NO Far more GM, Ford, Chrysler!!!
I found a forum the place a man had a problem wherever his ninety nine Blazer wouldn't shift to 4HI. When he pushed the 2HI button, The sunshine flashed but practically nothing transpired.
Your comment about stepping into slippery problems along with the 2Hi light goes out… the only thing I am able to visualize will be the TCCM (Transfer Case Manage Module) might have corroded wires, which was the first matter of the thread. Does this take place mechanically whenever you get into slippery circumstances?
Once again numerous thanks for the information and facts. My 4wd is Performing now as a result of you.$60 for pieces and a person hour to reinstall. Ron bobbitt in West Virginia
That’s odd that the light will come on quickly, with out flashing and without the need of participating the 4WD. The good light-weight coming on at 4Hi is usually an indication which the procedure is functional.
It Appears extra like “mechanic talk†to me — but who am I? What exactly do they declare to generally be the problem With all the TCCM? What Portion of it's bad?
three) the encoder motor/module is negative. This is the module/motor that may be mounted on to the transfer circumstance, who’s job it can be to physically transfer the gears from the transfer situation to put the TC into the various modes (2Hi, 4Hi, 4Lo).
Sherry suggests: September 22, 2008 at 3:15 pm I actually desire I discovered your site right before I replaced my tccm. I are now living in Canada and my 4wd stopped Operating. I have a 2003 blazer and where I Reside 4wd is really an complete will have to. I took it to a store and they may not determine the situation, so then I took it for the dreaded seller. They gave me a quotation of $1800.00 to exchange my encoder motor and transfer case Command module. I unquestionably couldn't pay for this so I took the estimate and found the sections on ebay, then I took it to the main shop and compensated them $two hundred to set up almost everything.
Hey Doug — many thanks for the data! That makes loads of feeling — now, if we can easily only discover the swap! If you consider it, the swap you mention could just be the root of the issue for just a couple of people who’s 4WD gained’t interact.
one) Enable’s start out with the simple things — have you checked your fuses? Don’t think that Because the fuses are labeled 4WD that they are the only kinds to your 4WD procedure! Fuse ten (on my 2003 Blazer) is for that courtesy lights — but guess what? Furthermore, it controls the logic aspect on the TCCM (+5VDC). Pin six (thinner orange wire) need to create +5VDC and will be Very hot All the time (meaning try to be capable to study +5VDC on Visit THIS Site the line whenever, vital on or off). The two big orange wires are your +12VDC lines and therefore are controlled with the 10A fuse situated in spot #15.
My to start with imagined is TCCM issues. Disconnecting the battery is an ordinary method to reset any “OB (On-Board) Computer system†(although it’s commonly suggested to disconnect for thirty minutes — basically therefore you don’t hurry it and it doesn’t reset). So, Anything you’re undertaking every time you are doing That is you happen to be resetting the TCCM. From there, it works, however, you never know for how long.
two) the vacuum switch also communicates While using the TCCM — no vacuum along with your lights will probably flash constantly while hoping to engage 4wd, but gained’t have interaction until finally all 4wd components, Once more, communicate with each other.
Heck, if ya wish to “hack†it jointly, you might usually eliminate the module from your aspect from the transfer situation, Slice a hole through the floor and put an real shifter throughout the floor and fasten it to your pin around the transfer situation (I wouldn’t advocate this on an ’03… possibly depart that trick for one which is slipping aside therefore you don’t want to spend An additional dime on it!) — You'll be able to shift into 4WD manually (All over again… NOT Encouraged on a street automobile!!).