Blowing 4x4 fuse with encoder and actuator unplugged

2006 CHEVROLET SILVERADO
191,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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SCHMIKYL
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My 4x4 worked when i got the truck a month ago, but here recently just got a "Service 4x4" code show up. I replaced the actuator and then noticed that the 4x4 fuse in the vehicle was blown. As soon as I replaced it, it just kept blowing once I turned the ignition on. Any clues or ideas?
Nov 4, 2020 at 2:52 PM
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ASEMASTER6371
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Good evening,

I attached the wiring diagram for you to view.

Can you tell me which fuse fails so I can trace that wiring for you?

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

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Roy

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Nov 4, 2020 at 3:24 PM
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SCHMIKYL
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The 4x4 fuse in the cab. Marked 4x4.

https://fuse-box.info/wp-content/uploads/2018/09/Chevrolet-Silverado-mk1-1999-2007_in1_99-02.jpg
Nov 4, 2020 at 4:49 PM
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ASEMASTER6371
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Okay, I attached what the fuse controls.

If you disconnected the switch and actuator and the fuse still fails, the wiring is shorted between the fuse block and the 3 components.

Roy
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Nov 4, 2020 at 5:09 PM
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SCHMIKYL
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I unplugged the 4x4 selector and unplugeed the plug under the hood for the actuator and it still blew the fuse.
Nov 5, 2020 at 11:06 AM
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ASEMASTER6371
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Okay, as I stated if the fuse still fails it is a wiring issue. The wiring is shorted somewhere after the fuse.

Roy
Nov 5, 2020 at 11:14 AM
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SCHMIKYL
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Are you thinking between the interior fuse panel and the plug of the actuator under the hood?
Nov 5, 2020 at 11:17 AM
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ASEMASTER6371
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Yes, I am. It could be there or to the switch.

Tracing the harness is the next step.

Roy
Nov 5, 2020 at 4:23 PM