Hi, I am the happy owner of a 59 plate focus! - Collecting it at the end of the week.
I would like to know how easy it would be to fit a dash cam to the car. After witnessing many nutcases on the road, I would like to make sure I am covered in the future.
I used to have a fiesta and found it very easy to remove the passenger window pillar. Is it as easy on the focus or will there be air bags?
I will need to run a power cable from the rear view mirror round the passenger side, down into the dash and then if possible, I would need an additional cigarette lighter socket behind the dash. I would rather not have it plugged in to my existing two.
Any help and advice would be greatly appreciated. 
It's really easy to do, you won't have any problems, shouldn't be any different from the Fiesta. There will probably be airbags, but they won't cause issues.
Just get an additional 12v socket of eBay for a few quid (really cheap), then you can just tap it into the wires for your existing sockets or into some other 12v source, plug in the cam and route the wire up the pillar and down behind the rear-view mirror.
The only problem I *thought* I had initially was that the 12v sockets on the Focus don't appear to go off with the ignition - they're on constantly, so I thought it might drain the battery to have a cam constantlly plugged in, and I wanted to have a source for my additional socket that DID go off with the ignition for that reason. But first I just left it plugged into my current socket for about 2 weeks overnight permanently as a test, and it didn't drain the battery at all, plus I quite like the idea of just recording 24/7 anyway now, so I just tapped into the same source as the current 12v sockets. No big deal

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You don't really need to wire it all the way behind the dash though, you can just have it behind the glove box and tap into the source near the fusebox. Or even just get some piggy-back fuses and plug straight into the fuse box there.