Main Fuse Removal/Installation

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Insert a tape-wrapped flathead screwdriver into the service hole in the position shown in the figure.

Fig 1: Inserting Tape-Wrapped Flathead Screwdriver Into Service Hole
Courtesy of MAZDA MOTORS CORP.
Move the flathead screwdriver in the direction of the arrow (1) shown in the figure, pull up the main fuse cover in the direction of the arrow (2) shown in the figure, and detach the main fuse cover tab from the main fuse.

Fig 2: Pulling Up Main Fuse Cover
Courtesy of MAZDA MOTORS CORP.
Remove the main fuse cover.

Fig 3: Removing Main Fuse Cover
Courtesy of MAZDA MOTORS CORP.
Remove the nuts.

Fig 4: Engine Wiring Harness Nuts With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Remove the main fuse.
Install in the reverse order of removal.