I hear the TCCM click Once i engage and disengage. I also listen to what appears like air leaking in the event the drivers door is open up and 4wd is engaged.
One thing you can Examine rapidly is to lay down beside the auto and also have someone SLOWLY generate forward (when in 4WD)… you’re seeking to see If your driveshaft from the TC on the front diff is definitely turning. If it is, the problem is ahead of that (ie. front diff), if not, the issue is within the TC.
I checked the wiring harness behing the passenger kick plate and it is fine and in tact. The wires are all generating Speak to.
Raymond Dunne suggests: January seven, 2008 at 10:27 am Perfectly just after alot of your time on my 2001 Jimmy 4wd procedure I am however stumped. Begun having a clicking noise from entrance stop so I checked vacuum actuator and it’s carrying out it occupation now that I loosened up the cable. Truck will never go into 2hi or 4lo so I pulled the Manage module and checked wiring. Large orange wire on ability connector was included in corrosion and a person wire on 32 pin connector was corroded.
May very well be a TCCM issue, encoder motor problem or a transfer scenario dilemma — all of which has been protected in just this thread.
Loosen the lock nuts. Between the tie rod and each tie rod close is actually a nut that holds it set up. You'll need to loosen this nut having a wrench. Be aware that on some automobiles, the driver's facet lock nut may very well be threaded counterclockwise, although the passenger aspect is threaded clockwise.
I hope this thread remains to be alive. In any case, I've situation acquiring from 4HI. I've read through all this discussion and Tried out a lot of things. I replaced the vacuum turn on the transfer scenario(mine was caught). Then I checked all vacuum lines(some have been cracked And that i changed). Pulled the encoder motor and cleaned it/took apart and re greased/sealed.
I would Check out your LARGE orange wires as you might be getting +5VDC logic as being the lights are approaching within the dash. The +12VDC is useful for the encoder motor — Check out to you should definitely have +12VDC at the two the large orange wires (they are appropriate beside each other… and There are 2 huge black wires beside them that happen to be floor). Notes: All black wires are ground — all orange wires are electric power (incredibly hot). There's a 10A fuse (#fifteen) for the 4WD process, located in the fuse panel. There's a 20A fuse, Found beneath the hood, which is also to the 4WD technique (I’ll must look up the fuse quantity). The 4WD method also pulls through the 10A courtesy lamp fuse (#ten).
When you Visit THIS Site hear the click with the TCCM, that informs you which the relays are working and are trying to put the encoder motor in gear. There are various reasons for this to occur, broken/leaking vacuum lines to start. The encoder motor wires could possibly be poor. There's a “plastic bushing” that retains a “fork” while in the transfer circumstance inside the placement (perfectly, the fork keeps the gears in the right posture)… Should the plastic bushing is worn, it may cause the transfer circumstance not to swap (this transpired to me, even so the signs had been the technique would swap to 4Hi/4Lo, that has a massive clunk, and it absolutely was very difficult for getting it back again outside of 4WD.)
It appears like the gears are participating during the transfer circumstance but I don’t listen to the actuator participating as well as the lights about the sprint don’t appear on. Any tips?
 Determined by your steering method, there may certainly be a clamp that should be eradicated at each end to be sure the bellows boot is just not sticking into the inner tie rod. Talk to your guide for information.
com as well as acdelco.com . No person is listing a module concerning four wheel drive or transfer scenario. If anybody can assist with a provider of the section, remember to email me at WeinCellar1811@aol.com . Thankyou, Dale
Upon talking to a few yards, they evidently choose these modules out ($$$$$$$) and simply cut the connector off and promote it While using the module. So, that actually only leaves me to your scrap property that lets you stroll about… and haven’t taken out the module… don’t wanna go there.
It doesn’t seem like it’s the same sort of method, so I’m probably not certain what to suggest to you personally. My method is actually a purely Digital a single (in which you force a button, which activates a motor to vary modes in your case)… yours looks like a mechanical procedure where you have interaction the 4WD manually (ground shifter) and the light comes on only being an indicator.