DQ Technologies, Inc., phone: 512.248.8324 - www.dqtech.com
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Preparation for Installation
Technical Requirements for Installation
• Be familiar with the functions, applications, and overall compositions of the product.
• Understand the electrical circuits and structure of motor vehicles and common installation methods
of in-vehicle devices.
Understanding of Installation Environment.
• Before device installation, installers should have a clear understanding of the vehicle, the
installation positions of the Dashcam and auxiliary cameras, the type and length of cables required
for each vehicle model, and the list of common auxiliary materials, to ensure successful
completion of device installation.
Check Vehicle Conditions and Vehicle-related Electrical Information
• Confirming vehicle information is essential for successful installation and ensures clear
responsibility to prevent any damage to the vehicle. For each component, proceeding to the next
step is only permitted after explicit confirmation. Each operation must be verified by both the
person in charge of the vehicle and the installation personnel.
(1) Check the appearance and interior trims of the vehicle for any damage.
(2) Verify the vehicle starts normally
(3) Confirm the vehicle power supply system is in good condition.
Power Supply Connection of Vehicle
Power supply connection through the loose wire:
This mode requires installation by professional installer:
o Required tool: multimeter
o Selection of power supply connection position
1. When the vehicle is shut down, use a test to see whether the circuit is live. If it is, this indicates a
constant power supply, after which you should measure the voltage.
2. When the vehicle is shut down but in the ACC position or ignition state, test to detect if the circuit is
live. If the circuit is electrically neutral when the vehicle is shut down and live in the ACC position or
ignition state, this indicates an ACC power cable, and the voltage should then be measured.
a. Voltage Measurement of Power Supply Connection
i. Constant Power Supply: When the vehicle is shut down, use a multimeter to measure
whether the voltage of the constant power supply cable is around 24V or 12V. If
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