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I tried to put the truck in 4 wheel drive I hear a clicking sound coming from the dash board

Tiny
O2BEME68
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 108,789 MILES
I just bought this SUV, used of course. I tried to put the truck in 4 wheel drive and two things happen( I have 2L, 4L, 4H and 4 wheel assist). I hear a clicking sound coming from the dash board and the lights on the selected buttons flash. Can you please give me some info on trouble shooting this problem or maybe a salution. Thank you.
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Saturday, September 20th, 2008 AT 5:57 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

It sounds like an issue with the transfer case module. That module is located under the passenger side dash.
Clicking noise tells you that the module is getting power but unable to change setting.
This could be also due to the module not getting proper power. This can also make the module not to function.

https://www.2carpros.com/articles/how-to-check-wiring

I have attached diagrams for your reference.

Please let me know if you have any questions.
Thank you.
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Monday, October 25th, 2021 AT 1:07 PM

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