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Four wheel drive not working

Tiny
FMC627
  • MEMBER
  • 2004 CHEVROLET S-10
  • 131,000 MILES
Mechanic says when he hooks up his diagnostic tool, it says there is no communication with the 4wd computer. The lights on the switch don't light up and 4wd does not engage. I have had this problem ever since the truck came back from the transmission shop.
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Monday, November 14th, 2011 AT 9:17 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
Check the wiring to the actuator on the transfer case. See if there is power to it. If there is, remove the actuator and check it for operation. If no power, work back to the relay and switch to see where power is lost.
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Monday, November 14th, 2011 AT 11:38 PM

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