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there should be an actuator on the transfer case and on the front diff

Answerthere should be an actuator on the transfer case and on the front diff

the encoder motor(solenoid) is on (I think) the passenger side of transfercase

Vacuum Switch with vac.lines is on the drivers side kinda of at the top of transfercase, there is a relay behind glovebox(for the push button) and there is a Vacuum Actuator under the battery box with a vacuum line on one end and a cable on the other that runs to the front diff. When you push your button you can actually hear the encoder motor and also the relay behind the glove box. I personally have had problems with the vacuum switch and the vacuum actuator. O.K. not sure if you can clean the encoder motor. They can actually seize up from not being used. I personally use my 4X4 all year (down gravel road, driveway or across yard) to make sure the encoder motors stays functional (these are very expensive)

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Q: How do you find and clean a solenoid on a 1994 Blazer S10 4X4 so the 4 wheel drive will work properly?
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