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Hand-held circuit tester with LCD screen, spring wire and alligator clamp

JASTIND Heavy Duty 3-65V DC Light Automotive 140 Spring Wire Circuit Tester

SKU CH-J7KY-4D18T

A 3–65 V DC circuit tester with a 140-inch spring wire, backlit LCD display and stainless probe for automotive electrical diagnostics

  • Team affiliation1 Piece
  • Key featuresBattery Powered, false
  • Product weight140 g
  • Product typeVoltmeter
  • Wide 3-65V DC range covers automotive circuits
  • LCD backlight shows voltage to .1V with ±.2V accuracy
  • Draws minimal current protecting sensitive electronics
  • 140g acetate fiber body with stainless steel probe
  • 140-inch spring wire reaches tight engine bay areas

JASTIND Heavy Duty Circuit Tester

This JASTIND heavy duty circuit tester is designed for automotive technicians and DIY users who need to diagnose low voltage DC electrical systems. It operates across a 3 to 65 volt range and features a bidirectional design that indicates voltage polarity regardless of which terminal the alligator clamp attaches to. The tool includes a sharp stainless steel probe for piercing wire insulation and an insulated rubber tip for shock protection.

LCD Digital Display with 0.1 V Resolution

The built-in LCD screen provides a blue backlight for clear day or night reading and shows voltage to a resolution of 0.1 volts with an accuracy of ±0.2 volts. Because the tester draws very little current, it is safe for use on sensitive computer controlled circuits found in modern vehicles. The display eliminates the guesswork associated with traditional incandescent test lights.

For 3 to 65 V DC Automotive Diagnostics

This tester suits mechanics and hobbyists troubleshooting headlights, taillights, sockets, fuses and general 3 to 65 volt DC wiring on cars, trucks or motorcycles. It is not suitable for mains voltage AC circuits, high voltage EV battery packs or any system operating outside the stated DC range. Buyers needing AC measurement or higher voltage capability should select a different instrument.

How it compares

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Price $27.99
Cheaper than about 56% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameJASTIND
Product typeVoltmeter
Size & build
Product weight140 g
More details
Team affiliation1 Piece

Questions about this item

What does the 3-65V testing range cover on a vehicle?

It lets you check low-voltage DC circuits such as headlights, taillights, fuse boxes and faulty sockets across cars, trucks and motorcycles that operate between 3 and 65 volts.

How does the digital display help when probing a circuit?

The backlit LCD shows voltage to 0.1 V with ±0.2 V accuracy, so you can read exact levels in daylight or darkness without guessing from a bulb brightness.

What length is the spring wire and how does it attach?

The coiled lead stretches to 140 inches and ends in an alligator clip that can clamp to either ground or positive for polarity testing.

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