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denes suggests: June 8, 2008 at 4:28 pm The encoder motors normally fall short over the 2002+ autrotrac (four 4wb buttons) blazers and s10 p/u’s. A printed circuit board contact “cooks out” Within the encoder motor confimation switches. Just so you recognize, the A,B, and C switches explain to the TCCM what general shift postion they’re in. the P switch is usually a singal for the TCCM when to prevent the motor (closing park postion). I am quite certain A is 2wd, B is 4wd Hello, and C is 4wd minimal. If you’re a little bit intelligent w/ electronics, You may as well fix the TCCM problems w/ new relays.

) — Verify that fuse! (Fuse #8, I believe — it’s NOT outlined as acquiring anything to complete Together with the 4WD process — I found that in the schematics.) You will find a few fuses that i'm aware of getting to carry out Together with the 4WD process — on under the hood (20A), a single during the dash fuse paned (10A) and one other could be the courtesy lights (15A, I think).

As I've stated often times inside the three web pages of this put up… all the things which i find out about the Chevy 4WD procedure is posted listed here. I haven't any further more details to provide. I'm not a mechanic.

When your toes strike something on the ideal… you have found the kick panel! This panel is snapped on, nevertheless it does hook below a few other plastic panels, so be a little bit careful with it.

That’s some very good info to have. Be sure to do let me know how you make out While using the encoder motor substitute.

Jim claims: February twenty five, 2008 at 4:07 am Possibly you can help me. Right now I still left for operate and my truck was in 2HI. About five minutes down the road no lights were 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 am able to hear and feel it engaging. My truck also appears to go in and out of 4HI and 2HI.I discovered a ice place on the pavement and when its in 2HI it can spin , but After i hit 4HI I hear a slight clunk and it'll choose off like its in 4HI.

It sounds more like “mechanic converse” to me — but who am I? What precisely do they assert for being the situation Using the TCCM? What part of it truly is undesirable?

I'd Check out your Significant orange wires as you are having +5VDC logic as the lights are coming on about the sprint. The +12VDC is used for the encoder motor — Check out to make sure you have +12VDC at equally the big orange wires (They can be suitable beside each other… and There's two big black wires beside them that happen to be ground). Notes: All black wires are ground — all orange wires are ability (very hot). You will find there's 10A fuse (#15) for that 4WD method, situated in the fuse panel. There's a 20A fuse, Positioned under the hood, that is certainly also for that 4WD program (I’ll really need to search for the fuse amount). The 4WD procedure also pulls from your 10A courtesy lamp fuse (#10).

Hey $one hundred forty is very darn excellent as compared to some of the quotes I have noticed people get to repair their 4WD! Regards;

I have found I might get it from 4HI in one of two means. If I park when stuck in 4HI and depart the car for a while, when commenced 4HI will flash and it reverts back to 2HI. OR If I set the truck in neutral, press 4LO (it goes into 4LO) then push 2HI, There exists clunk and it goes back again into 2HI.

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If by unplugging the TCCM you hope to the auto will default to 2WD — it gained’t. As long as it’s essentially working and driving your axle(s), go away it be and obtain it to the mechanic ASAP.

Decide the right camber. Camber is definitely the vertical angle with the wheels when thinking about the car head on.[10] Wheels that happen to be closer with each other at the best are deemed to obtain "detrimental" camber, These closer together at The underside have "good" camber.

The, you should try to set it in 4WD and see if any on the wires change (they should reduce their electric power) — you will have to do this various times to browse the different wires — and an assistant might be incredibly helpful! When you’re not receiving the higher than outcomes, Test exactly the same wires with the TCCM as find out if the effects transform.

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