Best Automotive Multimeter

David Smith

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Best Automotive Multimeter

In the fast-paced world of automotive diagnostics, having the right tools at your disposal is crucial. Automotive multimeters stand out as indispensable companions, enabling you to unravel the mysteries of your car’s electrical systems. In this comprehensive guide, we delve into the intricacies of the best automotive multimeters available in 2024, providing you with valuable insights to make an informed decision.

Understanding the Essence

Your car’s electrical health is paramount, and issues ranging from a dead battery to a malfunctioning alternator can be challenging to diagnose without the right tools. An automotive multimeter, a handheld device capable of measuring voltage, current, and resistance, becomes your ally in identifying and resolving electrical problems. With it, you can assess your car’s battery strength, pinpoint electrical issues, and troubleshoot problems with various components, from headlights to rogue circuits.

The Role of an Automotive Multimeter

Primarily, it’s the savior when your car refuses to start. It’s not just about testing the battery’s charge; it delves into detecting faulty wires and scrutinizing headlight wiring.

Best Picks in the Multimeter Arena

Automotive Multimeter

Let’s navigate through the cream of the crop, ensuring your automotive troubleshooting experience is top-notch.

Fluke 115 – Best Overall

Fluke 115

Fluke, a stalwart in the industry since 1948, presents the Fluke 115. Why is it the crème de la crème?

  • Non-contact capability for safe voltage detection.
  • New AutoV/Loz technology ensures accuracy.
  • Automatic detection of AC and DC voltage.

Fluke 115 stands as the epitome of automotive multimeters, delivering safety, accuracy, and user-friendliness.

What Customers Are Saying:
Over 98% of reviews are 4.0-star ratings and above, praising the rugged yet portable design of Fluke 115.

Maximum voltage, V: 600 DC/600 AC Current, A: 10 DC/10 AC Auto range: Yes Dimensions, mm/inch: 167 x 84 x 46 / 6.57 x 3.31 x 1.82 Weight, lbs/kg: 1.2 / 0.55

Fluke 117 Digital Multimeter, Non-Contact AC Voltage Detection, Measures Resistance/Continuity/Frequency/Capacitance/Min Max Average, Automatic AC/DC Voltage Selection, Low Impedance Mode
  • VoltAlert technology for non-contact voltage detection
  • AutoVolt automatic AC/DC voltage selection. DC millivolts - Range : 600.0 mV, Resolution : 0.1 mV
  • Low input impedance: helps prevent false readings due to ghost voltage
  • Large white LED backlight to work in poorly lit areas
  • True RMS for accurate measurements on non-linear loads.Operating temperature:-10°C to plus50°C.Battery life:400 hours typical, without backlight

Innova 3340 – Best Under $100

Innova 3340

For those budget-conscious yet unwilling to compromise on quality, the Innova 3340 is the hero.

  • Digital prowess with safety-enhancing pinpointers.
  • Auto-ranging and overload protection.
  • Temperature measurement capability.

Innova 3340 emerges as the budget-friendly champion, ensuring safety and functionality for automotive enthusiasts.

What Customers Are Saying:
Around 70% of reviewers give it a 5-star rating, commending its automatic single-resistance setting and versatile size.

Maximum voltage, V: 600 DC/600 AC Current, A: 15 DC/15 AC Auto range: Yes Dimensions, mm/inch: 317 x 114 x 165 / ‎12.5 x 4.5 x 6.5 Weight, lbs/kg: 0.6 / 0.26

Innova 3340 Professional Automotive Digital Multimeter, Black
  • Designed to pinpoint engine problems; tests alternator diodes, duty cycle, solenoids, breaker points, wiring, switches and more
  • Features auto-ranging, auto shut-off and over-load protection
  • Measures up to 15 amps for device testing
  • 10 MegOhm input impedance; safe for electrical and automotive use; prevents damage to the vehicle’s ECU
  • Includes temperature probe, inductive RPM clamp and carrying case

AstroAI DM6000AR – Best Under $50

AstroAI DM6000AR

For the frugal yet quality-conscious, the AstroAI DM6000AR packs a punch.

  • Measures voltage, current, capacitance, frequency, resistance, and temperature.
  • Thin pen measurers for accessibility.
  • Budget-friendly with a vibrant display.

AstroAI DM6000AR proves that affordability doesn’t mean compromising features; it covers all essential aspects of multimeter functionality.

What Customers Are Saying:
Over 90% of ratings are 4.0 stars or higher, with admiration for the easy-to-replace fuse and strong magnetic mount.

Maximum voltage, V: 600 DC/600 AC Current, A: 10 DC/10 AC Auto range: Yes Dimensions, mm/inch: 220 x 58 x 170 / 8.66 x 2.28 x 6.69 Weight, lbs/kg: 1.3 / 0.6

AstroAI Digital Multimeter and Analyzer TRMS 6000 Counts Volt Meter Ohmmeter Auto-Ranging Tester; Accurately Measures Voltage Current Resistance Diodes Continuity Duty-Cycle Capacitance Temperature
  • Versatile Digital Multimeter - Accurately measures AC/DC Current, AC/DC Voltage, Capacitance, Frequency, Duty Cycle, Resistance, Diode, Continuity and Temperature.
  • Thoughtful Design - Support Data Hold, Large LCD Backlit Screen, Auto Shut-off and Hanging Magnet, and Kickstand make the process of measurements easier. Professional level is reflected in some features include Auto-Ranging capability, and True RMS for measuring both AC Current and Voltage.
  • Suitable For Many Occasions - This Multimeter is a golden partner to help to troubleshoot a variety of automotive and household electrical problems safely and accurately.
  • Ensure Safety - Double ceramic fuse is anti-burn and protects from overloading,and it will be more secure and reliable; F400mA/600V and F10A/600V explosion-proof ceramic fuse tubes can protect the multimeter effectively.
  • Additional Tips - Please take off the cap before using the test leads.

Fluke 87 – For Professionals

fluke 87

When it comes to heavy-duty tasks and professional use, the Fluke 88 reigns supreme.

  • Withstands up to 8,000 volts, ideal for large vehicles and machinery.
  • Provides maximum and minimum readings for accuracy.
  • Tailored for professional mechanics, ensuring precision and durability.

Fluke 88 stands tall in the professional arena, offering robust features for heavy-duty automotive diagnostics.

Maximum voltage, V: 1000 DC/1000 AC Current, A: 10 DC/10 AC Auto range: Yes Dimensions, mm/inch: 201 х 52 х 98 / 7.93 х 2.06 х 3.86 Weight, lbs/kg: 1.4 / 0.62

Fluke 87V MAX True-RMS Digital Multimeter, Rugged, Waterproof and Dustproof IP67 Rated, Up to 800 Hour Battery Capacity, Built-In Thermometer, Withstands Drops Up To 13 Feet, Includes TL175 Test Leads
  • True-RMS accuracy with all functions of 87v and upgraded test leads.
  • Fully waterproof and dustproof with IP67 rating and 4-meter drop proven. Built to take too harsh and extreme environments.
  • Safety rated CAT III 1000 V, CAT IV 600 V meter to get you home safely from the job.
  • Lifetime, backed by a brand you trust.

Klein Tools MM400: Best Build Quality

Klein Tools MM400 Multimeter

Overall Rating: 4.3 stars
Award: Best Build Quality

Category Score (Out of 5.0 Stars)
Display 4.5
Accuracy 4.5
Additional Features 4.0


  • CAT III 600.0V safety rating for secure use.
  • Robust build to withstand drops up to 1.0 meter.
  • Digital auto-ranging for convenience.


  • Display lacks a bright backlight.

Our Experience with Klein Tools MM400:
Built for durability, the MM400 is an excellent choice for hobbyists and professionals working in demanding environments.

What Customers Are Saying:
With a 4.7-star rating, customers appreciate its build quality, though some desire more leads.

Klein Tools MM400 Multimeter, Digital Auto Ranging, AC/DC Voltage, Current, Capacitance, Frequency, Duty-Cycle, Diode, Continuity, Temp 600V
  • Multimeter measures up to 600V AC/DC voltage, 10A AC/DC current and 40 MOhms resistance
  • Electrical tester measures temperature, capacitance, frequency, duty-cycle, and test diodes and continuity
  • CAT III 600V safety rating
  • Built to withstand a 3.3-foot (1 m) drop and withstand daily wear and tear on the job site
  • Low battery indicator and easily accessible battery compartment

Automotive Multimeter Buying Guide

Auto-ranging Feature

Auto-ranging is the unsung hero, allowing versatility across different circuits. Always note your meter’s range for specific tests.

Voltage Range

The wider, the better. A broad voltage range means your multimeter can handle both higher and lower voltages.

Safety Ratings

Four-tier protection – operating voltage, insulation for AC currents, isolation and grounding, and grounding for DC currents. Ensure all four boxes are checked for a safe multimeter.

Size and Weight

Compact is the buzzword. A lightweight, portable multimeter is a game-changer, especially in the fast-paced world of automotive troubleshooting.

Accuracy of Automotive Multimeter

Precision is paramount. Opt for a reputable brand, read reviews, check recent calibration, and scrutinize specifications for accuracy.

Frequently Asked Questions

  1. What is a True RMS Multimeter?
    • A True RMS meter reads voltages as sine waves, providing accurate readings even for higher harmonics.
  2. What does OL mean on a multimeter?
    • Overload Indication; caution when probing excessive voltage.
  3. Auto-ranging vs. Manual Range: What’s the Difference?
    • Auto-ranging automatically selects the test range, while manual ranging requires choosing the range before reading.
  4. Are Innova multimeters any good?
    • Innova, a veteran in the field, has improved over the years, offering reliable multimeters.
  5. What can I measure with an automotive multimeter?
    • Voltage, current, resistance, continuity, diodes, frequency, capacitance, temperature, and sometimes humidity.
  6. Analog vs. Digital Meter: What’s the Difference?
    • Analog meters showcase a moving needle, while digital meters display changing digits.
  7. Is calibration required for automotive DMMs?
    • Manufacturers recommend calibration every 12-36 months for accurate readings.


In the realm of automotive multimeters, choosing the right tool can make all the difference. Whether you’re a seasoned mechanic or a DIY enthusiast, the Fluke 115, Fluke 88V, Innova 3320, AstroAI TRMS 6000, and Klein Tools MM400 stand out as the cream of the crop in 2023. Each excels in different aspects, catering to a diverse range of user needs. Make an informed decision based on your specific requirements, and empower yourself to tackle electrical issues with confidence.

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