Connecting Constant +12V Power (Red wire)
First things first, you’ll need to use a voltmeter to find the CONSTANT+12v source near the car’s dashboard.
This source can be found in a number of places and it is different with each vehicle. Some of these places and locations may be more suitable than others so when installing, do it right.
Next up is finding the wires you need, bulldogssecurity.com is an excellent source for that, it helps you with definite wire info making the process all the more easier. When selecting a wire, make sure it is a continuous source of +12v, the multi-meter should read roughly 12V regardless of the ignition switch position, if the doors are opened or if they’re closed and whether the lights or other accessories of the automobile are switched on or off.
The third main step is to join the RED wire from the GPS tracker to the +12V source, this is done using the type or joining of your choice. While doing that, make sure the 12 V source does not detach from the other circuit of the automobile. A strong connection should be made sure of, in order for it to survive the shock and temperature.