Lexus RX400h2006 Owner's Manual page 617

ELECTRICAL COMPONENTS
1. Turn the ignition switch off and remove the fuse box lid.
Determine which fuse may be causing the problem. The lid of
the fuse box shows the name of the circuit for each fuse.
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2. Make sure the inoperative component is turned off. Pull
the suspected fuse straight out with the pull−out tool and
check it. If it has blown, push a new fuse into the clips.