Laser Circuit Tester - 12 - 48V
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Laser Tools Circuit Tester 12 - 48V 4911Free delivery in 1–3 days£22.17Visit shop →
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LASER 4911 Circuit Tester For 12V To 48V Systems With LED Voltage IndicatorsFree delivery in 1–3 days£24.86Visit shop →
Product Information
Full details
The Laser Circuit Tester (12-48V) is designed for automotive technicians and DIY enthusiasts working with modern vehicles, offering quick and safe testing of electrical circuits from 12V up to 48V, including hybrid systems. Its key benefit is the ability to test low-current circuits (drawing only 3mA) without risk of damage. A minor caveat is the need to manually select between 12V and 42V modes, though this is clearly indicated by LED colors. It features automatic voltage identification, a coiled lead for maneuverability, and a clear handle for visibility.
All features
| Model Part Number | 4911 |
|---|---|
| Brand | Laser |
Extended Product Information
FAQs
What is the maximum voltage this tester can safely handle?
The tester is designed for circuits operating between 12V and 48V, with specific clear indications for 12V and 42V modes.
Can I use this tester on 24V truck systems?
While primarily rated up to 48V and specifically mentioning 42V MHEV systems, its 48V capability suggests it *may* function on 24V systems. However, always refer to the specific vehicle's electrical system requirements and consult the product manual for definitive compatibility.
How does the low current draw benefit me?
The low current draw (3mA at 12V) means it can safely test sensitive electronic components and low-current circuits without causing damage or interfering with their operation, unlike testers with higher current draw.
What is the purpose of the coiled lead?
The coiled sprung lead provides flexibility and maneuverability, extending from 0.7m to 2.5m, allowing you to reach different parts of the engine bay or vehicle interior without the lead getting in the way.
How do I know if I'm testing a 12V or 42V circuit?
The tester has two distinct modes indicated by super-bright LEDs. Press the Blue button for 12V circuits, and the Blue LED will light up. Press the Red button for 42V (up to 48V) circuits, and the Red LED will light up.
Is this tester suitable for general electronics work, not just automotive?
This tester is specifically designed and optimized for automotive circuits within the 12V to 48V range, including MHEV systems. While it might technically function on other low-voltage DC circuits, its features and safety ratings are tailored for automotive applications.
Troubleshooting
Tester does not light up when connected to a powered circuit.
Ensure the crocodile clip is securely attached to a good ground point. Verify that the correct voltage mode (Blue for 12V, Red for 42V+) is selected. Check if the circuit itself has power by testing a known live source.
Intermittent or weak LED illumination.
Check the connection of the crocodile clip to the ground. Ensure the probe tip is making solid contact with the test point. The vehicle's battery may be low; test under different conditions or check the vehicle's power source.
Tester seems unresponsive in 42V mode.
Confirm you are testing a circuit within the 42V-48V range. Ensure the Red LED is clearly illuminated for 42V mode. If the circuit is definitely live, inspect the probe and lead for any visible damage.
Pros and Cons
Pros
- Safely tests up to 48V systems, including modern hybrids.
- Very low current draw (3mA) protects sensitive circuits.
- Clear LED indicators for voltage selection.
- Flexible and long coiled lead enhances usability.
- Durable construction with clear visibility of the tool's interior.
Cons
- Requires manual selection between 12V and 42V settings.
- Primarily designed for automotive circuits; may not be suitable for all electronic applications.
- The pointed probe may require careful handling on delicate components.
Setup, Compatibility & Care
Setup:
- Ensure the circuit you are testing is switched off before making initial connections.
- Connect the insulated crocodile clip to a known good ground point on the vehicle chassis.
- Select the appropriate voltage mode: press the Blue button for 12V circuits or the Red button for 42V (or up to 48V) circuits. The corresponding super-bright LED will illuminate.
- Carefully touch the pointed probe to the circuit point you wish to test.
Compatibility:
- Suitable for automotive circuits operating between 12V and 48V.
- Specifically designed for standard fuel cars and 42V MHEV systems.
- Complies with CE, UKCA, and RoHS standards.
Care:
- Keep the tester clean and dry.
- Wipe with a soft, damp cloth as needed; avoid abrasive cleaners.
- Store in a protected, dry environment when not in use.
- Inspect the probe tip and crocodile clip for damage before each use.