The opposite wire I would Examine might be the A/T (Automated Transmission) shift lock switch — That is wire #31 and is also gentle inexperienced with a black stripe (there are far more webpages of the schematics previously mentioned… the primary is a hand -published website page in the TCCM connector pinout). This wire should have voltage placed on it at sure occasions — sad to say, I haven't had to diagnose that Portion of the system, so I don’t know if it should be +5VDC or +12VDC (but it will be one of these!
The, you need to try and put it in 4WD and see if any in the wires alter (they must lose their power) — you'll have To accomplish this various occasions to examine the various wires — and an assistant are going to be quite helpful! In case you’re not obtaining the previously mentioned final results, Check out the same wires at the TCCM as find out if the final results modify.
2) the vacuum swap also communicates Using the TCCM — no vacuum along with your lights will probably flash constantly though hoping to interact 4wd, but won’t have interaction right until all 4wd factors, Yet again, communicate with one another.
Do the identical on one other side. If there's no area to the tire where by the tread is flat, you might need to suspend your marking Resource by using a clamp or identical stabilizer.[5]
Drive the vehicle on to a flat place, jack up the front close, and position the car on jack stands. Ensure the steering wheel is unlocked.
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Complete Expense — 20 cents (a little dielectric gel and about a 50 percent hour labour). I’d like to see an Bill for your equivalent repair via the Chevrolet dealer!
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Keep the eyes on eBay — I just noticed a single Choose $135 that a guy purchased brand new 6 months in the past and is also scrapping the truck. You will find them at the Chevy supplier, but They are really ideal within the $five hundred mark — ouch!
As to the encoder motor currently being fried as the TCCM “obtained corroded and shorted it out†— again, it doesn’t seem more likely to me. You will discover (off-the-major of my head) seven wires in between the TCCM and also the encoder motor. two of these are electric power (+/-) and therefore are FUSE guarded. four of them are signal traces and the last one is sign ground. If the bottom wire was corroded and shorted (to what?
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They ended up choosing my vacuum switch was shot and Once i went back again the new swap continue to didn’t do the trick, in order that they figure it have to be the particular pushbutton assembly on the dash. ugh. No idea what that’s gonna Price, but I guess it’s spendy. On the bright facet they confirmed me in which the change was and the way to manually enable/disable 4wd by splicing the vacuum lines together with a snippet of brake line Will work similar to a allure in Hello and lo now so that seemingly principles out the remainder of the procedure.
Once you jack up the vehicle, be sure it is extremely steady before you climb underneath, and in particular Before you begin shaking your wheels to examine the suspension. If the vehicle have been to tumble off the jack stands, you could be badly hurt and even killed.
You position these strings parallel to the perimeters of your automobile pulled taught and using a modest plumb bob in addition to a ruler or gauge board, evaluate the gap with the thrust line string wherever it exits the back again of the vehicle to one facet outer string utilizing the plumb bob. Understand that length and move the ruler to the front, and do precisely the same detail, changing the entrance jack stand to test to have the gap the same. Repeat until eventually you're satisfied which the two strings are parallel. Then repeat for another facet of the vehicle. You wish your outside the house strings being about 9 inches away from a wheel facilities so you're able to switch your front wheels without hitting the strings. Proven underneath is usually a pair of pictures demonstrating the use of a plumb-bob (and dial indicator holder) to insure the strings are parallel (click on for greater photographs).