How to Install a Dash Cam and Hide the Wires (Step by Step, 2026)

by

Installing a dash cam takes about 20 minutes, and the part people get wrong is the cable: a wire dangling across the windshield looks bad and can get in the way. This guide covers where to mount the camera, how to hide the power cable along the headliner and A-pillar, how to set up the memory card, and the mistakes to avoid. You need no special tools, only a plastic trim tool (or an old plastic card) and some alcohol wipes.

What You Need

  • The dash cam, its mount, power cable and memory card
  • An isopropyl alcohol wipe or a microfibre cloth to clean the glass
  • A plastic trim tool, or an old plastic card, to tuck the cable into gaps (never a screwdriver)
  • Optional: adhesive cable clips to hold loose sections

Step 1: Choose the Mounting Position

The usual spot is behind the rear-view mirror, so the camera sits out of your line of sight. Aim for the top-centre of the windshield, just off the mirror on the passenger side. Keep it clear of any sensor housing around the mirror (rain, light or driver-assist sensors) and out of the tinted strip at the top of the glass if your car has one. Rules about where a camera may sit on the windshield vary by country and region, so check your local rules.

Step 2: Test Before You Stick

Power the camera up temporarily and hold it in place. Check the picture in its screen or app: the horizon should be roughly in the middle, and the hood should take up only a small strip at the bottom. Fix the angle first, since re-sticking adhesive mounts can weaken them.

Step 3: Mount It

Clean the glass with alcohol and let it dry. Peel the adhesive backing (or use the suction mount), press firmly for about 30 seconds, and attach the camera.

Step 4: Hide the Power Cable

  1. Start at the camera and push the cable into the gap between the windshield and the headliner (the soft ceiling trim). A trim tool makes this easy.
  2. Run it along the top edge of the windshield toward the passenger-side A-pillar (the pillar next to the windshield).
  3. At the A-pillar, tuck the cable behind the rubber door seal (weatherstrip) or behind the pillar trim, and run it down toward the dashboard. Do not place the cable across an airbag panel or where an airbag could deploy. Many cars have an airbag in the A-pillar, so keep the cable along the edge of the trim, not over any airbag marking or seam.
  4. Continue down behind the glovebox or dash trim to the power source, leaving a little slack so nothing pulls tight.
  5. Use adhesive clips on any section that will not stay tucked.

Step 5: Connect Power

The easiest way is the cigarette-lighter socket (12V outlet). But that socket often switches off with the ignition, so parking mode will not work. For always-on power, use a hardwire kit. My guide to hardwiring a dash cam compares OBD and fuse-box kits and shows how to install them. If you are deciding whether parking mode is worth it, read my parking mode explainer.

Step 6: Set Up the Memory Card

  • Format the card inside the dash cam (use the camera’s own format option in its menu or app), not on a computer. This makes sure the card has the file structure the camera expects.
  • Use a card rated for continuous recording. Dash cams write constantly, and ordinary cards can wear out and stop recording.
  • Turn loop recording on, so the camera overwrites the oldest files when the card is full.
  • Check the date and time, so footage is timestamped correctly if you ever need it as evidence.
  • Reformat the card every month or two, as many makers recommend, to keep it healthy.

Step 7: Rear Camera (If You Have One)

Route the rear cable along the headliner to the back of the car, tucking it into the trim along the roof edge, then down a rear pillar or trunk seal to the rear window. Take extra care where the cable crosses the door frame or trunk hinge, so the door does not pinch it.

Common Mistakes

  • Sticking the mount before testing the angle.
  • Blocking a windshield sensor or sitting in the tinted strip.
  • Running the cable over an airbag.
  • Pulling the cable tight, so it works loose over time.
  • Never formatting the card in the camera, which can cause recording errors.
  • Driving before the adhesive has set. Give it time, especially in hot or cold weather.

Frequently Asked Questions

How do I view dash cam footage?
Most cameras let you play files on their screen, over Wi-Fi in the maker’s app, or by putting the memory card in a computer or card reader.

How long does installation take?
About 20 minutes for a single-lens camera plugged into the 12V socket, and longer if you also fit a rear camera or hardwire it.

Do I need a professional to install it?
Not for a plug-in install. Hardwiring is also a manageable DIY job, and an OBD-port kit needs no fuse-box work. See my hardwire guide.

Still choosing a camera? See my best budget dash cam guide, and my picks for 4K dash cams from AliExpress.

Camera acting up? See dash cam not recording or showing an SD card error.