I recently bought an 04 Mazda and everything was going fine until 4 days later. My partner opened her door and the interior light strted flashing and a clicking sound started. I assume the battery is buggered as it was sitting on the forecourt awaiting it's sale. Any ideas peeps?

 

If you do not SHUT your door(s) properly (left ajar) you will hear a clicking noise where the door light switch is...all to do with your door light/locking system.. shut the door correctly.

Next, Either your CAR battery is good or not, if it holds a charge and the car starts it is possibly OK, all depends on when the battery was replaced...they only last around 4 years...
Does your starter 'click' constantly when you try and start your car?

Go get it tested (battery) at your local garage.

 

we were driving and parked up. turned the engine off and my gf opened her door to exit the car. the interior light started to flicker and a clicking sound started. sounded like the lock on the door was clicking. she shut the door and opened it again and it stoped.
starter motor is fine.

 

As I said, it is the above, or the door light switch may need looking at, it is the black concertina looking switch on each of your rear door to front door striker plate.

You can push it in and out (with door open) and hear the click or clicking if you don't push it in far enough...or door is not closed shut properly.

 

Thank you! Thank you! This has been driving me crazy for a while now