For instance, if you have a geofencing feature, you can see if it works by trying to get in and out of the marked zone.
On the other hand, you can check if the device tracks your mileage and so on. By doing this, you can figure out in the end whether you have installed the hardwired GPS tracking device right or not.
In the end, how will you know it works, if you do not try it first?
Conclusion
As a conclusion, you can do anything by yourself, including installing a hardwired GPS tracking device.
Having said this, the above-mentioned steps are really easy and if you follow them, you will create an amazing device for your vehicle.
Remember, safety is always a no.1 priority!