Got a 2010 fabia 1.4 tdi. Today while driving the interior light came on & the red door open symbol lit up on the dash, along with the door open alarm. It was a bit intermittent at first but on the way home it was on continuously
I couldn't set the alarm when i parked up as it set it off a few seconds after arming it. For now I've manually locked it by putting the key in the door lock.
In the summer I noticed that the rear passenger side door lock sounded a bit clunky & sometimes couldn't be opened using the door handle from outside & I had to operate the inside handle
My question is could this  be the problem & I need to replace the rear door lock unit, or is it the drivers door lock module that sends the signal to the alarm horn/dash light & interior light?

Would it be better to scan using vcds to pinpoint  the problem lock or would it not say?

Is there an online guide to help? I've replaced mk5 golf lock units before as they're known to be problematic but haven't done a fabia one before

It could be a broken wire where the loom passes into the door. A common fault on Fabias.

Thanks for the reply. I'll check the loom when the outside temperate gets a bit warmer as it seems a likely candidate

 

If there are broken wires is it better to get one of the connector & loom repair kits off eBay & solder  to the original  giving a bit of additional length of loom at the hinge area, rather than just resolder the broken original wiring (where the join will still be at the problem area of stress)

 

Is there room to just solder in place between pillar & door, or is it best to remove the interior panel & pull the loom & connector through?

Thanks for advice! 

 

From what I have seen here, unplugging the connector from the A pillar and releasing the door stop seems to be the solution. Thankfully, I haven't needed to do it myself.

My daughter's Fabia had the same problem.

There was a broken wire in the door loom at one point, which I soldered in the loom. I added an extra piece of cable in.

But the fault came back. Only this time it was a microswitch inside the door lock. I started a thread on this and you will find pictures.

Eventually I bought a new door lock.