My 2 wheel travel would interact although not my four. I read about the tccm along with the vaccum switch and to my specified amazement the vaccum line experienced damaged from the change. I fixed this issue and now my 4 wheel drive is Functioning again. The data you posted saved me a trip to some supplier!!!
So, you’re declaring the lights Usually do not flash when hoping to have interaction 4Hi? That’s slightly distinctive, with a few far more compact points to examine because the lights need to flash Should the TCCM is receiving the signal.
I checked the wiring harness behing the passenger kick plate and it is fine As well as in tact. The wires are all creating Call.
Your comment about entering into slippery ailments and the 2Hi light goes out… the only thing I am able to think about would be the TCCM (Transfer Circumstance Control Module) could possibly have corroded wires, which was the first topic of the thread. Does this occur automatically once you get into slippery ailments?
We now have 4WD. My wife is impressed with me and my hat is off for you sir. You saved us major time. Will gladly fund your retirement account for what you've got saved us. Let me know how.
I have an ’02 Chev 2500 with a manuel 4X4 shifter. My dilemma is always that 4hi received’t have interaction. 4lo seems to get the job done just great, axle engages, lights over the dash come on, I'm able to hear front axle actuator partaking, but Once i test 4hi almost nothing appears to be to occur.
The trouble, as I uncovered, was corroded wires while in the four×four module. The module is situated guiding the kick panel about the passengers side (see image below). How did I understand this? Whenever I'd personally interact my 4 wheel drive, I would listen to a “simply click – click” coming from that space… never thought just about anything of it ’til now!
PS – I have adjusted the configurations to permit registered associates to upload pictures/files. If you want to upload, you have to sign up. Sorry, even so the spam and also other crap is just preposterous anymore.
If you hear the clicking with the TCCM, that lets you know that the relays are Performing and are trying To place the encoder motor in gear. There are several reasons for this to happen, broken/leaking vacuum traces to get started on. The encoder motor wires may very well be poor. There exists a “plastic bushing” that keeps a “fork” from the transfer situation while in the placement (nicely, the fork retains the gears in the appropriate situation)… if the plastic bushing is worn, it can result in the transfer scenario not to swap (this took place to me, even so the signs or symptoms ended up the procedure would switch to 4Hi/4Lo, that has a large clunk, and it was quite challenging for getting it back again outside of 4WD.)
Greg states: December 19, 2007 at one:22 pm Many thanks for the extra tips. I wound up just getting it in for the store mainly because I was in more than my head once I bought outside of observing the shaft turning and the need was urgent (truck doesn’t travel value a darn in ANY degree of snow w/o 4wd).
1) let’s start off with the easy items — Have you ever checked your fuses? Don’t suppose that Simply because the fuses are labeled 4WD that they are the only ones for the 4WD method! Fuse ten (on my 2003 Blazer) is for the courtesy lights — but guess what? Furthermore, it controls the logic side in the TCCM (+5VDC). Pin six (thinner orange wire) must create +5VDC and should be Warm Always (indicating try to be able to browse +5VDC on the line Click Here To Investigate whenever, essential on or off). The two massive orange wires are your +12VDC strains and therefore are controlled within the 10A fuse located in location #fifteen.
Strategy B… I’ll attempt my neighborhood electronics shop and see if I will get a few of the woman ends (metallic clips on the end of each and every particular person wire… there are about thirty wires, I didn’t basically count).
This may or couldn't be linked to your difficulty, but another thing I'm able to tell you is to get it looked at ASAP.
Unfortunately, I’m probably not the male that can assist you With all the vacuum line as I’ve never experienced any problems with the vacuum and haven’t had the need to trace hoses. You might like to check this put up to determine if it might be of any help to you personally.