It's not a dead battery or alternator!!!

[CPH]

Fiesta MK7 1.6 diesel Titanium

Something is draining my battery intermittently.  2 or 3 times a month i go to start the car and just clicking no attempt to crank the engine over. The car will start off jump leads.   A new battery and a new alternator have been fitted.

New alternator is throwing out 14.7V and the battery (engine off) is reading 12.7V.  Does anyone have any ideas what could be happening here?

Thanks

[JAKE191]

Hi have you checked if your boot light is staying on 

[CPH]

Good point, for the time being I'll take the bulb out and see what happens there.  If it goes again then................... 😢

[Stoney871]

My first thought also.
Boot light, glove box, dash lights etc..
Could be a module staying live somewhere so a good check by an auto electrician may be called for.
Sometimes corroded earthing points can cause such problems.

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[Boonp]

Are you using FordPass on your phone. 

My Ford Focus seems to drain battery if not used for 1 1/2 days. Taken app off phone and since Aug 8 and no problem. 

Would like to use app for sync3 satnav 

traffic updates. 

[CPH]

Hi, No i'm not using FordPass on my phone

Cheers

[Paulkp]

Don't all interior lights go off after an hour anyway?  Easy to check, just leave the boot/glove box open, have a cup of tea and a tube of dark chocolate hobnobs (essential piece of kit when fault finding!) and by the time you have eaten the last biscuit the light should be off.