How to Install Dash Cam Front and Rear | Wired for Safety

Installing a front and rear dash cam involves mounting the front unit behind the rearview mirror, routing the rear camera cable through the headliner and pillars to the back windshield, and connecting power via the cigarette lighter, OBD-II port, or a hardwire fuse tap.

The box has two cameras, a cable that runs the length of the car, and a handful of trim tools. You don’t need a pro installer — most dual-channel systems follow the same steps, and a Sunday afternoon is enough time. Here’s the sequence that works for sedans, SUVs, and hatchbacks, using the power source that fits your car best.

Mounting the Front Camera Behind the Rearview Mirror

Clean the windshield area with alcohol or a degreaser until no dust or residue remains. Test-fit the front camera behind or near the rearview mirror, centered left-to-right, so it does not block your view of the road. Once the position is set, peel the adhesive backing and press firmly against the glass for 20–30 seconds. If the kit includes a sun-protector sticker, place it over the adhesive before mounting. Confirm the angle using the camera’s screen or the live feed in the app, then start the vehicle — the LED indicator should confirm it is powered.

Running the Rear Camera Cable Through the Headliner and Pillars

The cable routing varies slightly by body style, but the principle is the same: tuck the wire out of sight along the headliner edge. For all vehicles, start at the front camera and push the cable between the windshield and the headliner using a trim tool. At the A-pillar, gently pry the trim away — do not force it or the plastic clips will snap — and route the cable behind the airbag curtain (never in front of it). Continue past the B-pillar and along the rear door frame.

For SUVs and hatchbacks: run the cable to the liftgate, then thread it through the rubber hose that connects the body to the hatch. If the hose is tight, use a rigid thin wire or zip-tie as a guide. Secure the cable inside the hose with electrical tape, then tuck the rest behind the liftgate trim.

For sedans: route the cable to the rear deck and tuck it under the trim at the base of the rear windshield. Leave enough slack to reach the center of the glass where the rear camera will mount.

Mounting the Rear Camera and Connecting Power

Clean the rear windshield and mount the camera centrally, keeping the lens clear of the defroster grid lines — mounting over them blocks the view. Rotate the camera to create pressure and tighten the mount screw. Remove the plastic lens cover before final adjustment.

For power, you have three options, listed from simplest to cleanest:

• CLA (cigarette lighter adapter): Plug the power cable into the 12V socket; route the cord along the windshield and down the A-pillar. Easy, but the cable will be visible near the dash.
• OBD-II port: Connect the cable to the port under the dash. This keeps the dash clear but uses a port some vehicles reserve for diagnostics.
• Hardwire kit (fuse tap): Consult the owner’s manual to locate the fuse box. Attach the black ground wire to a bare metal bolt on the car body. Secure excess wire with zip ties under the dash or behind kick panels.

If you are deciding which dual-camera system to buy, our roundup of front and rear dash cams with night vision compares models tested for low-light performance, parking mode, and cable length — a good read before you start routing wires.

App Pairing and Final Alignment

Open the manufacturer app and pair with the front camera. A rear-camera toggle should appear once the system detects the second lens. Adjust both angles using the real-time video feed until the view is unobstructed. Confirm that recording starts automatically when the engine turns on — most systems begin within a few seconds of ignition.

One hard rule: do not place any camera where it blocks the driver’s view of the road. A spot behind the rearview mirror and off the passenger side is usually the safest choice for the front unit. If a mirror-mounted clip comes with your kit, use it to reduce windshield clutter.