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Handheld automotive circuit tester with blue backlit LCD display and front light

Automotive Circuit Fault Probe Tester 20A 48V

SKU CH-GTZ1-PB70B

High-precision 20 A / 48 V circuit tester locates shorts, traces wires and checks relays with a backlit LCD and built-in front light

  • Team affiliation1 Piece
  • Key featuresMain unit and battery, UL, Battery Powered
  • High-precision current measurement up to 20 A for fast fault diagnosis
  • 48 V operating range covers passenger cars and commercial trucks
  • Blue backlit LCD gives clear readings in bright or low light
  • Built-in front light illuminates work area for safer night-time maintenance
  • Compact portable design suits mobile diagnostics and workshop use

Automotive Circuit Fault Probe Tester

The Automotive Circuit Fault Probe Tester is a 20A 48V current tester designed for diagnosing electrical faults in household and commercial vehicles. It combines a wire tracer, short finder, relay checker and fuse checker in one compact unit. A backlit LCD screen and built-in front light provide clear readings in any lighting condition.

Technicians and owners needing 20A 48V circuit

This tool suits professional mechanics and vehicle owners who need to locate shorts, trace wires and verify relays or fuses on 48V systems up to 20A. It is not for technicians who require measurements beyond 20A or above 48V, nor for workshops needing bench-mounted analysers with data-logging capability.

20A 48V measurement range

The tester measures current up to 20A on circuits up to 48V, which is the single specification that determines whether it matches the vehicle system under test. If the circuit exceeds either value, a different instrument is required.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $31.99
Typical for this category: the median of 971 items is $30.99.

Specifications

Product
Brand nameaFe Power
More details
Team affiliation1 Piece

Questions about this item

Does the tester come with its own power source or do I need to buy a battery separately?

The unit ships with a battery included, so no separate purchase is required for power.

Should I choose a different model if I work on systems above 48V?

This tester is rated up to 48V, so it is not suitable for higher-voltage circuits.

What does the 20A rating mean when I am tracing a short on a live vehicle circuit?

It indicates the maximum current the probe can measure continuously, allowing detection of faults on circuits drawing up to 20A.

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