25a 4wd fuse keeps blowing

1990 CHEVROLET SILVERADO
300,000 MILES • V8 • 4WD • AUTOMATIC
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PASTORJARED
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a few days ago the 25A 4wd fuse blew and I replaced it. When I turned the truck on again, it blew again.
Is there something I can check that would remedy this? We are having a long winter and I need my 4wd back! thanks for your help!
Mar 2, 2011 at 7:51 PM
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MHPAUTOS
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I would un plug the transmission loom first and see it it still blows a fuse, if not the problem in below that plug, start to narrow down the problem first, let me know what you find.


mark (mhpautos)

Read this guide on testing wiring

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


Wiring diagram for the trans/transfer case is attached below
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Mar 3, 2011 at 9:44 PM
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KISSAB16
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The encoder goes bad and blows the fuse I replaced mine all good now.
Dec 18, 2019 at 10:26 AM
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