I'd Verify your LARGE orange wires as you might be having +5VDC logic as the lights are coming on on the sprint. The +12VDC is employed for the encoder motor — check to be sure you have +12VDC at each the large orange wires (They can be proper beside one another… and there are two large black wires beside them which might be ground). Notes: All black wires are floor — all orange wires are energy (incredibly hot). You will find there's 10A fuse (#15) for the 4WD system, located in the fuse panel. There is a 20A fuse, Found underneath the hood, which is also for your 4WD system (I’ll should lookup the fuse range). The 4WD technique also pulls from your 10A courtesy lamp fuse (#ten).
Alright….I just shed my 4WD wanting to get over the snow in front of me in my parking Room at function this morning. I acquired stuck bad four times in the final one/2 mile in advance of dwelling and finally had to walk the last 1/8 mile. It took me two hours to obtain household (about 5 miles!!!). It's possible they need to have plowed the roadways??? My one particular son in regulation thinks I can have attempted it in reverse. He provides a Ford that received’t let 4WD in reverse. Is Chevy the identical way? I recall possessing it in 4HI then seeking 4LO but at just one stage each lights have been blinking now they don’t mild at all. I just applied 4HI a couple of days back but hardly ever tried out 4LO until today.
It may well produce other parts, that are not over the common 4WD program, that may be the cause of your troubles.
Sadly, it’s been Pretty much nine a long time due to the fact I marketed my Blazer and possess no even further info for you other that what has previously been posted here.
Secondly, your dash buttons will come out of your sprint with tiny effort — come out the module and Examine the wiring harness about the back again of that. I’ve read of individuals practical experience problems with the actual buttons.
I didn’t recognize I had lost the hyperlinks for the schematics likewise over the conversion. What I've, I've extra back for the posting at the highest of the web page. I hope this helps!
The very first thing I might Look at is definitely the 4Hi gentle — (maintain it very simple) — does the 4Hi light-weight ever arrive on?
When it stopped Operating, I went exploring… initial behind the glove box, but I could Evidently see that the only real relay (the things that make that “simply click – click†sound) there was with the alerts (turning within the hazard lights verified this as you can Evidently hear the relay, not forgetting feel the click if you place your hand on it).
Even now it shows in “four wheel minimal†I come to feel my following transfer is removing the front generate shaft , and pulling the servo change motor on the transmission , it seems to be as In the event the are around 9 wires about to that servo motor, I’m I on the ideal tranck ?
Yet again many many thanks for your personal details. My 4wd is Doing work now thanks to you.$60 for parts and just one hour to reinstall. Ron bobbitt in West Virginia
What I might do is check the button assembly wires with the TCCM. If I’m not mistaken, I feel that the buttons are pulled large (+5VDC) and ground out on pressing them (I can be Erroneous, so remember to double Verify!). So, I’d examination Each and every one of several button assembly wires at the TCCM. The need to all be the same without buttons pressed.
The subsequent thing I found was which you reported the lights over the dash will flash when you press 4Hi — this tells you that the button for 4Hi is Doing work, as well as TCCM is accepting the sign from it. So, it boils all the way down to a problem somewhere concerning the TCCM and the encoder motor — I'd suspect the TCCM — perhaps wiring, or perhaps a bad TCCM.
The vacuum for that 4WD method begins around the drivers facet, goes for the vacuum actuator in the midst of the firewall (but underneath the distributor and challenging to see — This is certainly what I think you listen to — You review will find a picture up about ten posts or so) after which goes to the diaphram underneath the battery.
Now correct near drivers hood hinge There exists a couple of vacuum tee’s and a single has a short piece of hose operating in the direction of the fender having a screw in it. My issue is should there be a resevoir on the motorists fender region where this line must have went to? There isn't a way that GM place a sheetmetal screw in it. My Good friend includes a ninety five blazer and there's a resevoir un the bottom of hood. What am I lacking. I can send images if necessary. Thanks beforehand Shawn