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For those of you interested in having a dash cam in your car or if you already have one and would like to hard wire it into the vehicle, this tutorial is for you.
What I have installed in my car:
x1 GS90C Dashcam (Front facing)
x1 G90 Dashcam (Rear facing)
x1 Power Magic Pro Unit
x2 Add a circuit fuse connector (Something like this: Amazon Fuse Add a Circuit) or, Amazon.com/dp/b00ww4whbc : UXCELL Tap Adapter. (added to post 11/2/17)
Brief Introduction
When I first entered the dashcam scene, I had a basic entry level dashcam. Once I got my Cruze I upgraded to a better quality camera. At first it was simply plugged into the cigarette lighter. This works fine if you only want to record when the vehicle is running. What happens when you want to record if you're parked on a busy street? Most batteries in these cameras will not last nearly long enough and some only have super capacitors. To solve this, I installed the Power Magic Pro unit into the vehicle. This unit has 3 wires running from it. The first for connecting to a fuse that has power supplied when the vehicle is on, a second for connecting to a fuse that has constant power supplied even when the vehicle is off and a ground wire. There is a cigarette lighter plugin so you can plug your dashcam directly in to it with no modifications required. I have a cigarette lighter splitter plugged into my Power Magic Pro unit to run both of my dashcams. After properly wiring the Power Magic Pro to your fuse box, you can turn the Power Magic Pro's power switch to "ON" indicating you want power supplied to your cameras all the time (running off the constant power fuse) or you can switch to "OFF" indicating you want it to run off the other fuse and in turn have the cameras power down when the vehicle is off. The Power Magic Pro will monitor battery voltage and if it drops below your specified voltage, it will cut power to your cameras regardless of your setting to preserve your vehicle's battery life. You can also set a timer on the Power Magic Pro to cut power after a specified amount of time.
Detailed Install Notes
If you have just ordered a dashcam, first hook all of the components together to ensure they operate as intended. You can then proceed to hide the wires once fully tested. If you already have a dashcam installed and have hidden the wires, you should still avoid fully installing the Power Magic Pro unit until fully tested.
The above picture shows my current setup. I have the wires tucked up into the roofliner. Be careful not to pull on the roofliner too much as it may crease. If needed, take off the sun visor clip by pulling open the cap and unscrewing it. This will allow for a bit more room as you'll be able to pull the roofliner down a bit more.
The above picture shows where I have the wires run for my front facing dash camera. I have the power cable running to the left and down the A Pillar on the driver's side. I have it tucked under the rubber door seal weather stripping stuff and ran it down under the dash.
The above picture shows where I have the wire run for my rear facing dash camera. I have the power cable running under the plastic cover and in behind the rear folding seat. From there, I ran it down to the floor. See next picture.
I have the cable running under the plastic trim that meets the carpet liner. I have this run all the way to the front of the vehicle and up and under the dash.
The above picture shows the position where I mounted my Power Magic Pro unit. Wires look a little messy in the first shot, but this is a view from lower and isn't seen when sitting in the driver's seat as seen in the second picture. I have both of the cigarette lighter adapters for my dashcams plugged into a splitter and then the splitter is plugged into the Power Magic Pro unit. It's all zip tied together and held up onto a thick wiring harness by a couple more zip ties.
The above pictures show how I have my Power Magic Pro unit wired into my fuse box.
I have the 20A Front Power Outlet fuse pulled and plugged into the Fuse Add a Circuit to act as power for the Power Magic Pro when the vehicle is on. I have a second 10A fuse to put into the line that powers the Power Magic Pro unit. A fuse of this size is more than needed.
I have the 10A fuse for the OnStar service pulled and plugged into the second Fuse Add a Circuit to act as a constant supply of power regardless of whether the car is on or not. I have a second 10A fuse put into the line that powers the Power Magic Pro unit. I may switch to another fuse due to the fact that the cameras have stopped recording sometimes after an extended period of time while parked. It may be due to the fact that power is sometimes lost to the OnStar service for unknown reasons. Any fuse that has constant power when the vehicle is completely off will suffice for this installation.
What I have installed in my car:
x1 GS90C Dashcam (Front facing)
x1 G90 Dashcam (Rear facing)
x1 Power Magic Pro Unit
x2 Add a circuit fuse connector (Something like this: Amazon Fuse Add a Circuit) or, Amazon.com/dp/b00ww4whbc : UXCELL Tap Adapter. (added to post 11/2/17)
Brief Introduction
When I first entered the dashcam scene, I had a basic entry level dashcam. Once I got my Cruze I upgraded to a better quality camera. At first it was simply plugged into the cigarette lighter. This works fine if you only want to record when the vehicle is running. What happens when you want to record if you're parked on a busy street? Most batteries in these cameras will not last nearly long enough and some only have super capacitors. To solve this, I installed the Power Magic Pro unit into the vehicle. This unit has 3 wires running from it. The first for connecting to a fuse that has power supplied when the vehicle is on, a second for connecting to a fuse that has constant power supplied even when the vehicle is off and a ground wire. There is a cigarette lighter plugin so you can plug your dashcam directly in to it with no modifications required. I have a cigarette lighter splitter plugged into my Power Magic Pro unit to run both of my dashcams. After properly wiring the Power Magic Pro to your fuse box, you can turn the Power Magic Pro's power switch to "ON" indicating you want power supplied to your cameras all the time (running off the constant power fuse) or you can switch to "OFF" indicating you want it to run off the other fuse and in turn have the cameras power down when the vehicle is off. The Power Magic Pro will monitor battery voltage and if it drops below your specified voltage, it will cut power to your cameras regardless of your setting to preserve your vehicle's battery life. You can also set a timer on the Power Magic Pro to cut power after a specified amount of time.
Detailed Install Notes
If you have just ordered a dashcam, first hook all of the components together to ensure they operate as intended. You can then proceed to hide the wires once fully tested. If you already have a dashcam installed and have hidden the wires, you should still avoid fully installing the Power Magic Pro unit until fully tested.

The above picture shows my current setup. I have the wires tucked up into the roofliner. Be careful not to pull on the roofliner too much as it may crease. If needed, take off the sun visor clip by pulling open the cap and unscrewing it. This will allow for a bit more room as you'll be able to pull the roofliner down a bit more.

The above picture shows where I have the wires run for my front facing dash camera. I have the power cable running to the left and down the A Pillar on the driver's side. I have it tucked under the rubber door seal weather stripping stuff and ran it down under the dash.

The above picture shows where I have the wire run for my rear facing dash camera. I have the power cable running under the plastic cover and in behind the rear folding seat. From there, I ran it down to the floor. See next picture.

I have the cable running under the plastic trim that meets the carpet liner. I have this run all the way to the front of the vehicle and up and under the dash.


The above picture shows the position where I mounted my Power Magic Pro unit. Wires look a little messy in the first shot, but this is a view from lower and isn't seen when sitting in the driver's seat as seen in the second picture. I have both of the cigarette lighter adapters for my dashcams plugged into a splitter and then the splitter is plugged into the Power Magic Pro unit. It's all zip tied together and held up onto a thick wiring harness by a couple more zip ties.



The above pictures show how I have my Power Magic Pro unit wired into my fuse box.
I have the 20A Front Power Outlet fuse pulled and plugged into the Fuse Add a Circuit to act as power for the Power Magic Pro when the vehicle is on. I have a second 10A fuse to put into the line that powers the Power Magic Pro unit. A fuse of this size is more than needed.
I have the 10A fuse for the OnStar service pulled and plugged into the second Fuse Add a Circuit to act as a constant supply of power regardless of whether the car is on or not. I have a second 10A fuse put into the line that powers the Power Magic Pro unit. I may switch to another fuse due to the fact that the cameras have stopped recording sometimes after an extended period of time while parked. It may be due to the fact that power is sometimes lost to the OnStar service for unknown reasons. Any fuse that has constant power when the vehicle is completely off will suffice for this installation.