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Where is the alternator fuse on Lincoln Navigator?

The Lincoln Navigator's alternator doesn't have a dedicated fuse in the traditional sense. The alternator's charging circuit is protected by the Integrated Power Module (IPM) or a similar power distribution center. There's no single fuse you can replace to fix an alternator issue.

If you suspect a problem with your Navigator's alternator charging system, you'll need to have a qualified mechanic or auto electrician diagnose the issue. They will use diagnostic tools to pinpoint the problem, which could be the alternator itself, the IPM, wiring, or other components. Replacing the wrong part based on a guess about a "blown fuse" could lead to further damage and expense.