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4x4 problems with 1994 s10 blazer
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carterpat
New User
Jan 2, 2015, 1:15 PM
Post #1 of 4
(3149 views)
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4x4 problems with 1994 s10 blazer
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1994 s10 tahoe blazer 4x4 4.3 vortex been trying to figure my problem out and also i
accidentally push 4lo at sixty mph on accident
stupid me lmao...so i replace actuator under the
battery i have replaced all vaccum lines i checked
the front switch and it was good and clean the
module was clean no corrosion or anything changed
the switch on the t case for vaccum nothing
changed..cable is free and isnt seized..replaced
the dash switch nothing..replace the module for
4x4 nothing so i am deep into my pockets with this
and my truck is sitting at 203k and still
strong...the encoder motor is all good and clean
at the plugs and it makes a whinnig sound like its
moving into position.
ok thats what i have did and replace and this is
what it is doing i push it into 4hi or 4lo just
blicks and module clicks and says its in 4hi but
its in 2wd same with 4lo wont engage and clicks
but goes back to saying its in 4hi...im very
mechanically incline and first time using the web
cause im puzzled to crazy so if any one could help
thanks and its seems like the front axle isnt
being engaged?
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gsferraro
Veteran
Jan 2, 2015, 4:28 PM
Post #2 of 4
(3133 views)
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Re: 4x4 problems with 1994 s10 blazer
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Hello,
What you may want to try first is, have someone hit the 4x4 hi button, if you can tap the encoder motor and see if it moves into position.
Have you scanned the 4x4 module?
Looks like you replaced everything, the last couple i worked on(forgot the years) the encoder motor was the problem.
Heres something you may be able to try(ive done this on some transfercases to help in my diagnosis) take off the encoder motor and turn the shaft to see if the transfer case is can go into 4x4.
when you push the buttons you may hear noises coming from the encoder motor but it may not be moving far enough.
Very important tip, if it comes to it that the encoder motor is the problem, do not purchase a doorman product. the last one i had, the encoder motor was bad, i had my supplier send me a doorman and it didnt work, i called a different supplier, he too sent a doorman and that didnt work(at this point you start thinking maybe im wrong in the diagnosis) went over everything again, but this time i got i think a cardone and it worked. Gary
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carterpat
New User
Jan 2, 2015, 10:05 PM
Post #3 of 4
(3121 views)
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Re: 4x4 problems with 1994 s10 blazer
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thanks for the information and i dont have no service engine soon light on and how would u scan the module and also i tried to tap it while someone hit the button but didnt do anything so ill probably pull the encoder motor and replacing it or make sure it didnt jump or something..it does wmake a winning noise when pressing the button 4hi or 4lo so i thought i was ok but yeah the front aint engaged and the 4hi light stays on but its in to wheel drive...ill keep udated and when i find it out i will let you know thank you very much for the information again
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gsferraro
Veteran
Jan 3, 2015, 3:59 AM
Post #4 of 4
(3111 views)
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Re: 4x4 problems with 1994 s10 blazer
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Hello,
Its very possible the motor isnt moving far enough. If you have a good scanner like snap-on, see if it gives you the option to scan the transfer case control module or tccm. I always like to check my powers and grounds. Gary
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