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4wd Inop.

1589 Views 4 Replies 3 Participants Last post by  MotionMan, 
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Low range works fine but not high, why? 2003 Excusrion, 111,000 miles.
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okney1lz said:
Possibly a Mode Select Switch malfunction. Any trouble codes? I think the 4x4 module has it's own self test through a scanner.
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Thanks, but no codes shown. Do you think that this is a self-helpable repair or dealership only?
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