Strictly Mobile Electronics
Strictly Mobile Electronics

Tech Tips

A short primer on how GPS trackers and kill switch relays work in your vehicle — helpful context before your install or when troubleshooting.

How a GPS tracker works

A GPS tracker has three parts: a GPS receiver that reads its position from satellites, a cellular modem that uploads that position to a cloud server, and a power connection (hardwired directly to your vehicle's battery via a constant 12V wire and ground). You view the position through an app.

The tracker reports on a schedule (for example, every 30 seconds while moving). If the vehicle enters or leaves a geofence you set, the app sends an alert.

How a kill switch relay works

A kill switch is a relay we splice into your starter circuit. When armed from the app, the relay breaks the circuit so the engine can't crank. When disarmed, the circuit closes and the car starts normally.

On push-to-start vehicles the relay sits inline with the start button signal; on turn-key vehicles it sits inline with the starter solenoid. Either way, normal driving is unaffected until you choose to disable it.

Why power matters

Because the tracker is hardwired to your vehicle's battery, it shares the same power source — if the car battery runs down from sitting unused or a parasitic draw, the tracker loses power too. If your car will sit for a week or more, take it for a short drive or use a trickle charger to keep the battery healthy and the tracker reporting.

Good to know

  • A tracker needs cell signal to upload — in a parking garage it may show a stale last-known location until you drive out.
  • Kill switches only stop the starter; they don't lock your doors or disable other systems.
  • Never cut or splice factory wiring yourself — our relay install is reversible and warranty-covered.

For step-by-step fixes for common issues, see our Quick Support page.