In this guide, we are highlighting a fantastic installation walkthrough by the channel CashedOutCars. They demonstrate how to install the Wolfbox G840S on a van, covering everything from the basic mounting to a clean hardwire setup.
Whether you are looking for a simple plug-and-play solution or a professional-looking install with no visible wires, this guide has you covered!
Step 1: Mounting the Mirror Unit
The G840S straps directly over your existing rear-view mirror, making it a universal fit for most vehicles.
Positioning: Place the Wolfbox unit over your factory mirror.
Adjustment: The front-facing lens is on the left side. If it hits your original mirror, slide the Wolfbox unit slightly to the side to clear the obstruction.
Secure It: Use the included rubber straps to strap it down firmly around the back of your original mirror.
⏱️ Video Start: 00:01:47
Step 2: Initial Power Test
Before you spend hours hiding wires, always test the system first to ensure everything works!
Plug & Play: Connect the power cable to the unit and plug the adapter into your car's cigarette lighter port.
Verify: Turn the car on to ensure the screen powers up.
Peel & Rotate: Remove the protective film from the screen. Then, rotate the front camera lens (it spins 360 degrees) to get the perfect angle for the road ahead.
⏱️ Video Start: 00:02:24
Step 3: Rear Camera Connection & Test
Connect: Plug the rear camera cable into the top of the mirror unit (labeled AV IN).
Check View: The screen should automatically switch to the rear view.
Orientation: Make sure the image is right-side up. If it's upside down, flip the camera unit itself before you mount it.
⏱️ Video Start: 00:03:18
Step 4: Mounting the Rear Camera
You have two main options for placement: High (better field of view) or Low (better for backing up to trailers).
Location: In this video, we mounted it outside the vehicle, above the rear doors (on a van) for a wide, clear view.
Clean & Stick: Clean the mounting surface thoroughly with alcohol. Use the provided double-sided tape (or screws) to secure the camera.
Pro Tip: Mounting it high up often prevents the camera from getting dirty as quickly as mounting it near the license plate.
⏱️ Video Start: 00:03:33
Step 5: Hiding the Wires (Clean Install)
To get that "factory" look, you need to hide the cabling behind your car's trim.
Tuck It: Use the orange pry tool included in the kit to push the wire into the gap between the headliner and the roof trim.
Weather Stripping: Gently pull down the rubber weather stripping on your door frames. You can run the wire inside these pillars and then push the rubber back in for a seamless look.
Route to Rear: Continue running the wire all the way to the back of the vehicle to connect to the rear camera.
⏱️ Video Start: 00:04:43
Step 6: GPS Module Installation
The GPS module records your speed and location data, which can be vital for insurance claims.
Connect: Plug the GPS into the GPS port on the top of the mirror.
Mount: Stick the module to your dashboard or the top of your windshield.
Signal: Ensure the side indicated ("GPS" or logo side) faces up towards the sky for the best signal reception.
⏱️ Video Start: 00:05:36
Step 7: Reverse Light Trigger (Red Wire)
If you want automatic parking lines when you reverse, you must connect the Red Trigger Wire.
Find the Circuit: Locate the positive wire for your reverse lights (either at the tail light bulb or in the vehicle wiring harness).
Splice: Use a "T-splice" or tap connector to attach the Red Wire from the rear camera cable to the vehicle's positive reverse light wire.
Result: Now, whenever you shift into Reverse, the screen will automatically show parking guidelines. (Note: The user in the video preferred the wide view without lines, so he unplugged this, but the steps are here if you want it!)
⏱️ Video Start: 00:06:08
Step 8: Hardwire Kit (Parking Mode)
To enable 24-hour parking monitoring (time-lapse) and free up your cigarette lighter socket, use the Wolfbox Hardwire Kit.
The 3 Wires:
Ground (Black): Connect to a solid metal bolt on the vehicle's chassis (unpainted metal is best).
Switched Power (ACC - Red): Use a fuse tap to connect to a fuse that turns on/off with the key (e.g., radio, wipers).
Constant Power (Batt+ - Yellow): Use a fuse tap to connect to a fuse that always has power (e.g., horn, headlights).
Function: This allows the camera to record a low-power time-lapse while parked and wake up fully when you start the car.
⏱️ Video Start: 00:07:39
Once everything is wired up, tuck away any remaining loose wires and secure them with zip ties under the dash. You now have a clean, professional-looking install!
💬 Want feedback on your install?
Reply with:
Vehicle model/year
Where you mounted the rear camera (inside rear window / outside bumper)
2–3 photos of your routing and the on-screen view
Our team and community members can offer suggestions!