When switching from 4hi to 4low the indicator light on the dash (4wheels with transfer case) goes out and the 4wd light comes on. The only way to clear it is to put it back in 2wd, put it in park and shut it off. 4hi seems to work fine. Any thoughts or ideas. I need somewhere to start. Winter weather is right around the corner. Thanks. Also does anyone know the process for running the self diagnostic for the 4wd system?
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