Rear Window Defroster Switch Inspection

Remove the climate control unit. (See CLIMATE CONTROL UNIT REMOVAL .)
Inspect for continuity between the rear window defroster switch terminals using an ohmmeter.

Fig 1: Inspecting Rear Window Defroster Switch (1 Of 2)
Courtesy of MAZDA MOTORS CORP.

Fig 2: Inspecting Rear Window Defroster Switch (2 Of 2)
Courtesy of MAZDA MOTORS CORP.
Connect battery positive voltage to terminal L and ground to terminal E.
Turn the rear window defroster switch to ON.
Verify that the LED illuminates.
- If not as specified, replace the climate control unit.