OK….I just missing my 4WD attempting to recover from the snow in front of me in my parking Area at get the job done this early morning. I obtained caught undesirable four moments in the last 1/two mile just before residence And eventually had to wander the last 1/8 mile. It took me two hours to acquire house (about five miles!!!). Perhaps they should have plowed the roadways??? My just one son in regulation thinks I might have attempted it in reverse. He incorporates a Ford that gained’t permit 4WD in reverse. Is Chevy the identical way? I don't forget having it in 4HI then seeking 4LO but at just one position both of those lights have been blinking now they don’t light-weight whatsoever. I just utilized 4HI a few days in the past but hardly ever attempted 4LO till today.
It sounds “electrical†to me… appropriately, the very first spot I’d get started looking is in the TCCM for corrosion. Then, I’d Look into the schematics posted inside this thread and begin seeking sensors.
Just one Notice… not all vacuum switches are located to the firewall. If it’s not there, check the top within your transfer situation!
The one difficulty you should have is since you have two wires disconnected, you need to know which one particular goes to which hole (terminal). For those who notify me the colours, I can try to Identify them in your case (be precise with wire hues — ie. white with light inexperienced stripe, pink with dark blue stripe, and so forth.).
) The 4lo light-weight justs blinks continuously never goes in only goes again to 4hi. I below the clicking Using the TCCM And that i also listen to the encoding motor working also.
As far as I know, if the “Service 4WD†light-weight comes on, There's a problem during the transfer scenario, or even the sensor connected to your transfer scenario. This can also transpire When the sensor receives wet (ie. driving through a deep puddle).
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Properly, that’s one that I haven’t read nevertheless. The “ATS†fuse (that's marked “ATC†on this schematic) materials 12VDC to two huge orange wires at the TCCM (marked as pins C18 and C19 on the schematic). As I stated, I haven’t noticed this problem in advance of, so I haven’t traced that part of the technique. I am able to only suppose (yeah, I do know!) which the for the reason that these wires supply 12VDC, They can be utilized to run heavier things including the encoder motor (5VDC, that's The sunshine guage orange wire, is useful for logic — ie. to run the “chips†within the circuit board). With any luck ,, you are able to see where I’m heading using this type of. I’m just seeking to think about it logically — If your fuse is blowing that supplies 12VDC, what within the 4WD program would use 12VDC?
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So, devoid of bodily taking away the encoder motor module and manually shifting the Transfer Case into 2Hi, sad to say, it’s caught in 4WD until eventually you may get it to a mechanic.
Jim states: February twenty five, 2008 at four:07 am Probably you will help me. Today I still left for operate and my truck was in 2HI. About five minutes in the future no lights have been on, in my four×4 activate the sprint. I pushed the 2HI button and it lit suitable up. My truck does go into 4LO as I can listen to and truly feel it participating. My truck also seems to go in and out of 4HI and 2HI.I found a ice place on the pavement and if its in 2HI it is going to spin , but After i hit 4HI I listen to a slight clunk and it'll acquire off like its in 4HI.
Sad to say, I don’t have any real expertise Along with the support 4WD light-weight. As I claimed to my guest under (just the get I answered the posts), it always suggests a dilemma within the transfer circumstance — difficulties codes needs to be set, so you may need to possess it scanned by your mechanic.
Heck, if ya need to “hack†it jointly, you may always clear away the module with the side of the transfer situation, Slice a hole from the ground and set an genuine shifter with the floor and attach it towards the pin within the transfer case (I wouldn’t recommend this on an ’03… probably leave that trick for one that is slipping apart so you don’t want to spend another dime on it!) — You'll be able to change into 4WD manually (All over again… NOT RECOMMENDED on the Avenue vehicle!!).