21/5W Bulbs 12V 380 Type Side and Brake 10 Pack - AB Tools - Tr149
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Product Information
Full details
The AB Tools 21/5W 380 Type Bulb 10-Pack is designed for automotive technicians and vehicle owners looking for a reliable, bulk replacement solution for dual-filament lighting needs. These bulbs offer a versatile dual-element design that manages both side light and brake light functions within a single unit, providing a convenient 'all-in-one' lighting solution for 12V systems. While these bulbs are highly compatible with standard automotive sockets, users should verify their vehicle's manual to ensure the 380 type bulb is the correct fitment for their specific tail light assembly to avoid compatibility issues.
All features
| Model Part Number | Tr149 |
|---|---|
| Brand | AB Tools |
Extended Product Information
FAQs
Are these bulbs LED or filament based?
These are traditional filament-based 380-type bulbs.
Can I use these for my turn signals?
No, these are designed specifically for side and brake light configurations using a dual-filament setup.
What does the 21/5W rating mean?
It indicates the bulb uses 21 watts for the high-intensity brake light and 5 watts for the lower-intensity side light.
Will these fit a 24V lorry?
No, these bulbs are strictly for 12V automotive electrical systems.
Do I need to replace both bulbs if only one blows?
It is highly recommended to replace both bulbs at the same time to maintain equal brightness and lifespan across your tail lights.
How should I dispose of old bulbs?
Check your local municipal waste guidelines, as they often have specific drop-off points for automotive glass and metal components.
Troubleshooting
Bulb does not light up at all
Check that the bulb is fully seated in the socket and the pins are locked. Inspect the vehicle fuse box for a blown tail light fuse.
Only one filament works (side light or brake light)
Check the wiring harness for corrosion or loose connections. If the issue persists, test the socket with a multimeter to ensure current is reaching both contacts.
Bulb flickers or goes out quickly
Ensure the socket contacts are not oxidized; use a small wire brush or contact cleaner if necessary to improve electrical conductivity.
Pros and Cons
Pros
- Dual-function design reduces the need for multiple bulb types
- Convenient 10-pack ensures you have plenty of spares on hand
- Reliable performance for critical brake light safety
- Standardized 380-type base makes installation straightforward
- Cost-effective solution for frequent maintenance
Cons
- Not compatible with 24V commercial vehicle systems
- Specific to 380-type socket configurations only
- Standard filament technology lacks the longevity of modern LED equivalents
Setup, Compatibility & Care
To install these bulbs, ensure your vehicle ignition and lighting systems are completely switched off. Access your tail light assembly according to your vehicle's service manual—typically done by removing a plastic cover in the boot or undoing external screws. Remove the old bulb by pushing down gently and twisting counter-clockwise. Insert the new 380 bulb by aligning the pins with the slots, pushing down, and twisting clockwise until it locks securely.
Important Care Tips:
- Do not touch the glass: Always handle the bulb by its base or use a clean cloth to prevent skin oils from causing hot spots on the glass.
- Compatibility: Ensure your existing wiring harness supports the 380 type socket. These are for 12V systems only; installing them in a 24V system will cause immediate failure.
- Replacement: It is recommended to replace bulbs in pairs to ensure even brightness across the rear of the vehicle.