1. Verify that there is no continuity between antenna feeder terminals A and B using an ohmmeter.

2. Inspect for continuity between the antenna feeder terminals using an ohmmeter.

Front antenna feeder inspectionMazda 6 Service Manual: Foot Brake
This vehicle has power-assisted brakes that adjust automatically through normal
use.
Should power-assist fail, you can stop by applying greater force than normal
to the brake pedal. But the distance required to stop will be greater than usual.
WARNING
Do not coast with the engine stalled or t ...
Mazda 6 Service Manual: Power Moonroof Reset Procedure
If the battery is disconnected, the moonroof will not operate. The moonroof will
not operate correctly until it is reset.
Carry out the following procedure to reset the moonroof and resume operation:
1. Switch the ignition ON.
2. Press the tilt switch, to partially tilt open the rear of the moo ...