Dash Cam Installation & Wiring Tips
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A dash cam is only as good as its footage — and poor mounting, glare, or a badly routed cable can ruin a clip right when you need it. These are the practical points that matter once you've picked a camera and are ready to fit it.
Where to mount it
Behind the rear-view mirror, centred, and within the small area the wipers actually clear — mounting outside that area means rain and grime build up directly in shot. Keep the lens close to the mirror stalk rather than off to one side, so it isn't angled across the dashboard reflecting interior lights back into frame at night.
Cable routing that doesn't get in the way
Tuck the power cable up into the headliner along the top of the windscreen, down the A-pillar, and under the dash trim to a 12V socket or fuse tap — most interior trim panels on modern cars unclip by hand or with a plastic trim tool, no special tools needed. Never run a cable loose across the dashboard or footwell; it's a distraction and a trip hazard, and it looks like exactly the kind of thing an MOT or state inspection tester will flag.
Hardwiring vs cigarette lighter power
A cigarette lighter (12V socket) cable is the simplest option — plug and play, no wiring — but it only records while the car is on (or until a plugged-in cam's internal battery runs out), and it ties up your one socket. A hardwire kit taps into a fuse that's live only with the ignition on or in accessory mode, and usually includes a low-voltage cutoff so continuous parking-mode recording doesn't flatten your car battery overnight.
Avoiding glare and reflections
A polarising filter (many cams include one, or sell one as an accessory) cuts dashboard reflections in the windscreen, which otherwise show up as a ghostly double image over the real footage — most noticeable on a light-coloured dashboard in bright sun.
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Frequently Asked Questions
Will hardwiring a dash cam drain my car battery?
Only if it's wired without a low-voltage cutoff. Most hardwire kits include one that stops recording once the battery drops to a safe threshold, protecting your ability to start the car.
Can I fit a dash cam myself?
Yes — mounting and cigarette-lighter power need no special skills. Hardwiring into a fuse box is still straightforward on most cars but involves working near the fuse panel, so follow your specific kit's instructions closely.
Why does my footage look washed out or blurry at night?
Usually glare from an unfiltered windscreen reflection, or the lens picking up dashboard dust and fingerprints — clean the lens and windscreen area regularly and consider a polarising filter.
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