Become a Dash Cam Installation Pro with This DIY Guide!
DIY Dash Cam Installation Guide: Before You Start
So you have decided you want or need a dash cam. Great. The next questions are usually “how is it installed?” and “will there be wires hanging everywhere?”. The good news is that most modern dash cams installed in a very similar way, and many steps can be done safely by a beginner if you go slowly and follow a plan.
All dash cams work with the same basic idea: the camera mounts on the windscreen and the front dash cam plugs into power, either through a 12/24 V cigarette lighter socket or a hardwire cable to the fuse box. If you have a front and rear dash cam, the rear camera is powered through a long connecting cable from the front unit, not directly from the car.
Step 1: Choose the best mounting position
A well‑placed camera sees more of the road and is less distracting. Aim for the top centre of the windscreen so the lens has a clear view over the bonnet. If your car has a big “safety eye” box behind the rear‑view mirror and the dash cam won’t fit under it, slide the camera slightly to the passenger side so it stays out of your main line of sight.
Before peeling the adhesive backing, hold the mount in place to do a “dry fit” and make sure the lens is not blocked by the black ceramic dots at the top of the glass. Clean and dry the glass thoroughly, then stick the mount on once you are happy with the position. In cold weather, gently warming the adhesive pad near a heater vent helps it grip the windscreen better.
Step 2: Plug‑and‑play power using the cigarette lighter
For many DIY installers, the easiest method is plug‑and‑play using the supplied cigarette lighter cable. Most dash cams include around 4 m of cable, which is long enough to hide neatly around the edges of the windscreen in most cars.
Follow this route:
- Run the cable from the front dash cam up to the roof liner and tuck it into the gap where the glass meets the lining.
- When you reach the A‑pillar (the pillar between the windscreen and the front door), push the cable into the soft black weather‑stripping that runs down the pillar instead of removing the plastic cover.
- Continue to the footwell and hide the cable in gaps or along trim edges until you reach a 12/24 V socket near the gear stick or centre console, then plug it in.
Turn on the car and check that the dash cam powers up. If it does, go back and tidy the cable runs so nothing hangs down or catches on your feet. With this method, the camera will turn on and off with the engine, which is perfect for simple “record while driving” setups.
Step 3: Understand hardwiring for parking mode
If you want the dash cam to watch over your car while it is parked, you will normally use a hardwire kit. Many dash cams include a hardwire cable as standard, or as an option, so the camera can draw power from the car battery even when the ignition is off.
The hardwire cable runs around the windscreen just like the cigarette lighter cable, but instead of ending at a socket, the bare wires connect to the fuse box. Add‑a‑fuse adapters (also called fuse taps) act like double adaptors: you pull out a fuse, plug in the adaptor, and then re‑insert the original car fuse so the dash cam and the original circuit both get power.
Because choosing the wrong fuse or wiring incorrectly can stop car features working or make parking mode unreliable, Dash Cams Australia strongly recommends that a qualified auto‑electrician installs the hardwire cable into the fuse box. If you are not confident with electrical work, use the plug‑and‑play method or an OBD‑II power cable instead.
Step 4: Use an OBD‑II cable for plug‑and‑play parking mode
If hardwiring feels too technical, some dash cam systems support a special OBD‑II power cable. This lead plugs straight into the car’s on‑board diagnostics port under the dashboard and powers the dash cam for both driving and parking, with a built‑in voltage cut‑off to protect the battery.
Dash Cams Australia describes this as a game‑changing plug‑and‑play option, because it gives you park‑mode recording without touching the fuse box or hiring an installer. For many DIY users, it is the best balance between safety, simplicity and features.
Step 5: Routing the front‑to‑rear cable for 2‑channel systems
Two‑channel (2CH) systems have a second camera at the back of the car, linked by a long cable. The supplied cable is usually around 6 m, enough for most sedans, with longer options available for vans or utes.
For DIY routing:
- Start at the front camera and run the rear cable up to the roof liner.
- Feed it along the liner to the A‑pillar, just as you did with the power cord.
- Tuck the cable into the black door weather‑stripping that runs along the top of the front and rear doors – it can be gently opened with your fingers and closed again around the cable.
- Continue along the roof liner above the rear window and plug the cable into the rear dash cam.
In a hatchback, leave a small loop of slack near the rear door hinge so the cable does not pull tight when you open and close the tailgate. Professional installers often hide the cable entirely inside the roof liner using a fish‑rod, but this risks disturbing curtain airbags if you are not experienced, so stick to the safer DIY route described above.
Step 6: Know when to call a professional
Even with a clear DIY dash cam installation guide, not every job will be comfortable for every person. If you are not confident working near airbags, not sure how to access the fuse box safely, or you simply want the cleanest possible install, using a professional auto‑electrician is the smart choice.
Dash Cams Australia notes that customers often report paying around $200 for a neat front‑only install and about $250–$350 for a front and rear system, which is fair value for the time, tools and experience involved. For many drivers, especially with newer or more expensive cars, that cost is small compared to the reassurance of knowing the wiring and trim have been handled correctly.
Extra tips to keep your DIY install safe
- Never push cables or tools into areas marked with “airbag” and avoid removing A‑pillar or roof‑liner trim unless you know exactly what is behind it.
- Always test the dash cam after each big step, so you know where any fault appears if something stops working.
- Keep any spare cable neatly bundled and tucked into safe cavities, not wrapped around pedals or steering components.
- If in doubt about power connections, choose the cigarette lighter or OBD‑II method, or book a professional hardwire installation.
From beginner to dash cam installation pro
By following the same practical steps outlined by Dash Cams Australia—smart mounting, tidy plug‑and‑play routing, careful rear‑camera cabling, and a clear understanding of when to use hardwire or OBD‑II power—you can install a dash cam confidently in many everyday vehicles. With a little patience and this DIY guide, you move from nervous first‑timer to someone who understands exactly how the system is fitted and how to spot problems early, which is the true mark of a dash cam installation pro.