Drivers side
1. Remove the driver-side front door trim.
2. Connect the power window main switch connector.
3. Measure the voltage at the power window main switch terminals as indicated below.
4. Disconnect the power window main switch connector before inspecting for continuity at terminals 1M (1J*2) and 1F (1L*2).
Terminal voltage list (Reference)


*1 : With rear power window system (L.H.D.)
*2 : Without rear power window system (L.H.D.)
*3 : R.H.D.
Except drivers side
1. Turn the power-cut switch to UNLOCK.
2. Inspect for continuity between the power window main switch terminals using an ohmmeter.

Power window switch removal/installation
Power window subswitch inspectionMazda 6 Service Manual: Operation
System triggering conditions
The horn sounds intermittently and the hazard warning lights flash for about
30 seconds when the system is triggered by any one of the following:
Unlocking a door with the key, door lock switch, or an inside door-lock
knob.
Forcing open a door, the hood or th ...
Mazda 6 Service Manual: Location index
INTAKE-AIR SYSTEM
FUEL SYSTEM
Engine Room Side
Fuel tank side
EMISSION SYSTEM
Engine room side
CONTROL SYSTEM
...