Rear Window Defroster Switch Inspection

WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.

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.