1. Disconnect the negative battery cable.
2. Remove the headlight cleaner switch. (See HEADLIGHT CLEANER SWITCH REMOVAL/INSTALLATION)
3. Inspect for continuity between the headlight cleaner switch terminals using an ohmmeter.


Headlight cleaner switch removal/installationMazda 6 Service Manual: Intermittent concern troubleshooting
Vibration Method
1. If malfunction occurs or becomes worse while driving on a rough road or
when engine is vibrating, perform the steps below.
Note
There are several reasons vehicle or engine vibration could cause
an electrical malfunction. Some of the things to check for are:
...
Mazda 6 Service Manual: Rear beltline molding removal
Note
When removing the rear beltline molding, the clip may be damaged.
If the clip is damaged, replace it with a new one.
1. Pull the A section upward and remove the clip.
2. Rotate the B section of the front beltline molding in direction (2), along
the direction (1) shown in the figu ...