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Not really sure what you mean by a "inner" fuse, here is a wire diagram of the control circuit for the rear hatch pull down motor, maybe this will help?
The Power Window Motors and the Power Lift-Gate Motor all use an "Internal" Bi-Metal Strip Contact
(Essentially a self-resetting Circuit Breaker for situations where the Motor becomes too hot, and could draw more Current than the corresponding Wiring could safely support).