Before installation, disconnect the vehicle's main power supply (remove the negative battery terminal to prevent short circuits). If temporary power-on testing is required, ensure that the wiring terminals are not exposed and there is no risk of grounding.
Electrical devices for 12V vehicles must strictly match the voltage; do not connect 24V devices. High-power equipment (such as car refrigerators and inverters) must draw power directly from the battery and be equipped with fuses of corresponding specifications (calculate using the formula "Power = Voltage × Current", and the fuse current should be slightly higher than the rated current of the device).
Prioritize the use of "non-destructive wire connectors" and "fuse box power plugs". If wire cutting is unavoidable, wrap the connection tightly with insulating tape and prevent the wires from direct contact with the metal vehicle body (to avoid grounding short circuits).
Cigarette Lighter Power Supply: Directly plug into the cigarette lighter socket. Route the wire harness along the edge of the A-pillar interior panel and front windshield (use a pry bar to gently pry open the gap of the interior panel and insert the wire harness).
Fuse Box Power Supply:
① Locate the fuse box in the driver's cabin (usually under the steering wheel or on the left side of the instrument panel; some Dolica models have it beside the passenger glove box). Use a test light to find the "ACC interface" (powered when the ignition switch is turned on, and powered off when the engine is off to avoid battery drain from the device).
② Select a "fuse box power plug" of corresponding specification (such as mini or medium size, which must match the fuse box slot size). Insert the plug into the ACC fuse slot and place the original fuse into the spare slot of the plug.
③ Connect the negative wire (black) to the vehicle body ground point (find a vehicle body screw, sand off the paint with sandpaper, tighten the wiring terminal, and wrap it with insulating tape).
Direct Battery Power Supply: Suitable for dash cams requiring 24-hour monitoring. A "low-voltage protection module" must be installed (to prevent battery drain). Connect the positive wire to the positive battery terminal and the negative wire to the negative battery terminal. Route the wire harness along the engine compartment wire harness into the driver's cabin (avoid high-temperature components such as the exhaust pipe and turbocharger when threading).
Fix the dash cam to the upper right corner of the front windshield (without obstructing the view) using a suction cup or 3M tape. Adjust the lens angle to cover the front of the vehicle and the lane.
Power on to test recording, audio recording, and parking monitoring functions, and confirm that the memory card is recognized normally.
Host (display screen, which can be connected to the central control screen or a separate small screen), camera (waterproof type; for Dolica light trucks, "license plate frame type" or "rear bumper drilling type" is recommended), wire harness (with reverse trigger wire), insulating tape, and electric drill (for drilling holes).
Host Installation: If connecting to the central control screen, remove the central control panel (use a pry bar to gently pry open from the edge, being careful to retain the buckles) and find the original vehicle reverse camera interface (if not available, connect with an AV cable). If it is a separate small screen, fix it beside the instrument panel or on the left side of the steering wheel with a bracket.
Camera Installation:
① Drill a hole (with a diameter matching the camera base, approximately 10-12mm) at the rear bumper or license plate frame position. Fix the camera to ensure the lens faces directly backward (without obstruction).
② Route the camera wire harness along the vehicle chassis (avoiding the drive shaft and tires) into the driver's cabin. Secure the wire harness with cable ties during threading to prevent wear and tear.
③ Locate the reverse light wire harness (in the trunk/rear light assembly of Dolica). Open the rear light cover and use a test light to confirm the "reverse light positive pole" (powered when the reverse gear is engaged; the negative pole is connected to the vehicle body ground or the rear light assembly negative pole). Connect the camera's "reverse trigger wire" (usually red) to the reverse light positive pole using a non-destructive wire connector, and connect the negative pole to the ground.
Testing: Shift into reverse gear, confirm that the display screen automatically switches to the reverse camera image, and adjust the camera angle (to ensure no image distortion and visibility of the ground markings at the rear of the vehicle).
Disconnect the negative pole: First use a wrench to loosen the screw of the negative battery terminal (black, marked "-"), remove the wiring terminal, and wrap it with insulating tape (to prevent accidental contact with the positive pole).
Disconnect the positive pole: Then loosen the screw of the positive battery terminal (red, marked "+") and remove the terminal.
Remove the fixing frame: Loosen the fixing buckle or screw above the battery and take out the old battery (note the weight, approximately 15-20kg, to avoid collision).
Clean the terminals: Use sandpaper to polish the new battery terminals and old terminals to remove oxide layers (to ensure good conductivity).
Place the new battery: Align it with the fixing frame and ensure the positive and negative poles are in the same direction as the original vehicle (to avoid reverse connection).
Connect the positive pole: First connect the positive terminal and tighten the screw (with moderate force to avoid thread slipping).
Connect the negative pole: Finally connect the negative terminal. After tightening, shake the terminal by hand to confirm no looseness.
Testing: Power on and start the vehicle. Confirm that there are no fault lights on the instrument panel (such as the battery warning light). Idle the engine for 10-15 minutes (to allow the generator to charge the battery).
Open the engine compartment and locate the corresponding light assembly (headlights are on both sides of the front of the vehicle; turn signals are next to the headlights or on the bumper).
Unscrew the dust cover at the rear of the light assembly (some are rotary, some are buckle-type).
Pinch the bulb base and rotate it counterclockwise to remove (note: halogen bulbs are high-temperature; wait for them to cool down before operation, and avoid touching the glass bulb with hands—grease on hands will cause high-temperature burst).
Confirm that the model of the new bulb matches the original vehicle (e.g., common headlight models are H4 and H7; common turn signal models are PY21W). Insert the bulb into the base and rotate it clockwise to fix.
Reinstall the dust cover and ensure it is sealed (to prevent water ingress and light assembly short circuit).
Power-on testing: Turn on the corresponding lights and confirm that the brightness and flashing frequency are normal (LED bulbs must be confirmed to have a "decoding" function to avoid fault reports from the original vehicle's computer).
