What should be paid attention to when installing automotive headlight parts?

To ensure safety, performance, and compliance during installation, please keep the following key points in mind:

1. Safety First: Power Disconnection

Always disconnect the vehicle power (remove the negative battery terminal) before installation to prevent short circuits.

If testing is required, connect the power briefly without prolonged energization to avoid overheating or circuit damage.

2. Match Model and Interface Correctly

Confirm that the new part is fully compatible with your vehicle model and year (e.g., halogen/LED/HID type, plug specification).

Never mix light sources of different wattages to prevent circuit damage or fault codes.

3. Protect Wiring and Ensure Waterproof Sealing

Secure all connectors firmly with clips to avoid looseness.

Check that rubber seals/caps are intact, and ensure the housing is fully sealed after installation to prevent moisture ingress.

4. Precisely Adjust Beam Angle

After installation, use professional equipment or a wall projection method to adjust the beam angle.

Avoid excessively high or scattered light to prevent glare for oncoming traffic (compliance requirement).

5. Cleanliness and Protection

Clean the lens and surrounding areas before installation to avoid internal contamination.

Do not touch bulb/lens surfaces directly with hands (skin oils can cause localized overheating or light decay).

6. Function Test and Road Verification

After installation, test all functions (high/low beam, turn signals, etc.).

Perform a low-speed night road test to confirm full illumination coverage without blind spots.