Install a Vehicle Tracker - GS900

Last updated 20 days ago

Overview

The GS900 is a wired GPS vehicle tracker with 4G/2G connectivity and GPS/BDS satellite positioning. This guide walks you through installing and verifying the device. A SIM card is pre-installed before shipping, so no SIM setup is required on your end.

It can be used across different vehicle types and weight classes, from passenger vehicles to heavy trucks and trailers.

Installation takes about 10–15 minutes and requires basic access to the vehicle's 12V battery.

What's in the box

GS900 tracker with wiring harness (red and black wires connected; orange and yellow wires are unused and factory-insulated)
Pre-installed inline fuse on the red wire
Pre-installed SIM card (inside the device)

You'll also need: cable ties or sponge double-sided tape to secure the device.

Before you start

The device ships with its internal switch in the OFF position. You need to open the shell and turn it ON before installing.

Slide off the upper shell of the device (pull in the direction of the arrow shown on the housing).
Locate the internal switch near the SIM card slot.
Slide the switch to ON.
The indicator lights will start blinking, confirming the device has powered up.
Close the shell.

Choosing a mounting location

Where you place the device affects GPS accuracy and device life. Follow these rules:

Requirement	Why it matters
Waterproof, dry location	The device is not rated for direct water exposure — mount it away from moisture.
Lights (top of device) facing up	The GPS antenna is built in — an upward-facing, sky-oriented position gives the best signal.
No metal blocking the top of the device	Metal above the device blocks GPS and cellular signal.

Once positioned, secure the device with a cable tie or sponge double-sided tape.

Wiring the device

The GS900 uses two wires. The orange and yellow wires are not used — leave them insulated and untouched.

Wire	Connects to
🔴 Red (+)	12V battery positive terminal
⚫ Black (−)	Ground
🟡 Yellow, 🟠 Orange	Not currently intended for use

An inline fuse is already installed on the red wire — do not remove or bypass it.

Steps

Locate the vehicle's 12V battery.
Connect the black wire to ground (−).
Connect the red wire to the positive (+) terminal.
Confirm the orange and yellow wires remain insulated and are not touching any terminal or metal surface.

Verifying the installation

After wiring is complete and the switch is ON, use the indicator lights to confirm the device is working.

Startup sequence

On power-up, the indicator lights start blinking.
If the device is running on its internal battery, the red power light slowly blinks after you turn it on manually.
After a few seconds, the LTE light and GPS light become steady. The device has now entered normal working status.

Indicator light reference

LED	Quick blink	Slow blink	Steady on	Off
Red — Power	—	Normal (internal battery)	Normal (external power)	Fault or sleeping
Yellow — LTE	Searching for signal	Normal working	—	Search failed or sleeping
Blue — GPS	Searching for signal	Normal working	—	Search failed or sleeping

Reporting behavior

Once installed, the device reports location on the following schedule:

State	Update frequency
Powered on	Every 5 minutes
Powered off	Once per day

Troubleshooting

Problem	Possible cause	Solution
Failed to connect to the internet	SIM card not installed	Check that the SIM is seated.
	SIM card not installed properly	Reinstall the SIM.
	No LTE network	Move the device to an area with LTE coverage.
	Weak LTE network	Move the device to a stronger-signal location.
Location failed	SIM card has no LTE data function	Contact support.
	Always returns "failed to get location"	Contact support.
No GPS location	Device is in an obstructed area (basement, tunnel, dense structure)	Move the device to an open-sky location.

Next steps

Once the device is installed and verified, complete setup in the Fleet Portal: