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Because the servo is electric, check the fuse panel for a blown fuse - there's a 25 amp fuse in your panel somewhere. The fuse is blown for a reason, ranging from an old fuse which is just "tired", to a "short" in the system, to a worn out servo. You might be lucky and stop at the fuse.

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βˆ™ 2004-11-30 12:02:59
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Q: Why might the 4 wheel drive not engage on a 1989 Chevy 4 x 4 with electric servo motor?
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