Brake Light Noise Filter
1. Inspect for resistance and continuity between the noise filter terminals using an ohmmeter.


Rear Window Defroster Noise Filter
Inspect for resistance and continuity between the noise filter terminals using an ohmmeter.


Noise filter removal/installation
Condenser removal/installationMazda 6 Service Manual: System wiring diagram
ABS (ABS/TCS)
DSC
FOREWORD
Before performing the steps in Symptom Troubleshooting, perform the
On-board Diagnostic Inspection. To check the DTC, follow the DTC Inspection
steps.
...
Mazda 6 Service Manual: Front door lock actuator inspection
Door Lock Actuator
1. Disconnect the front door lock actuator connector.
2. Apply battery positive voltage to the front door lock actuator terminals
and inspect the operation of the front door lock actuator.
If not as specified, replace the front door lock actuator.
With double locking ...