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 Rated 4.8 Excellent - Trusted By 17,000+

FaultLynk ™

$259.99
$259.99
SAVE Liquid error (snippets/price line 116): Computation results in '-Infinity'% Sold out
 

check_circle Pinpoint real faults instead of guessing

check_circle Test safely without frying your electronics

check_circle Trigger components solo without jumper wires

check_circle Works on every car truck and trailer

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Automotive Fuse Assortment Kit
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Automotive Fuse Assortment Kit
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I've used test lights and multimeters for years, but FaultLynk cuts my diagnostic time way down. I probe the wire, read the exact voltage, and I'm done instead of guessing for an hour. Honestly, I'll never not own one now.

Verified Buyer - Elena R.

  • Clip the probe leads onto your vehicle's battery terminals to power up.
  • Press the Mode button and probe the wire or connector to read exact voltage, resistance, or waveform on the color display.
  • Flip to activation mode to trigger lights, fans, or motors straight from the probe tip, no jumper wires or extra hands required.

  • 1 x FaultLynk Automotive Circuit Tester
  • 1 x User Manual

We offer free shipping for all orders. Once your item/s is dispatched,
the estimated delivery time is:

- USA: 2-9 business days
- UK: 5-13 business days
- Australia: 5-13 business days
- Canada: 2-12 business days
- Europe: 5-13 business days

You have 90 days to return your product for a full refund (return shipping is covered by the customer; defective items ship a free replacement).

✓ Official Authorized Retailer

This product is not available on Amazon or eBay. You are purchasing directly from the only authorized seller — which means full warranty, verified authenticity, and dedicated customer support. Beware of counterfeit listings on third-party marketplaces.

FaultLynk

FaultLynk

 4.8/5
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  • Over 17,000 recommend FaultLynk

Built to End the Guesswork in Every Garage

swap_horiz

Runs on Both 12V and 24V Systems

Switch between 12V and 24V without swapping tools. The same tester covers your car, motorcycle, trailer wiring, and heavy-duty truck jobs.

lightbulb

Instant Polarity Feedback

Dual color LEDs flash red or green the moment you connect. You'll know your circuit's polarity before ever touching a multimeter.

FaultLynk
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Hands-Free Component Activation

Trigger lights, fans, and motors right from the probe tip. Skip the jumper wires and work solo, even in tight spaces.

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Built-In Circuit Protection

Internal safeguards automatically block short circuits and reverse polarity. Test lights, fans, and motors without worrying about a costly mistake.

What our 17,000+ Customers say

Based On Real and Honest Experiences

Elena R.

I've used test lights and multimeters for years, but FaultLynk cuts my diagnostic time way down. I probe the wire, read the exact voltage, and I'm done instead of guessing for an hour. Honestly, I'll never not own one now.

Elena R.Verified Buyer
Marcus D.

Used FaultLynk on my truck to chase down why my trailer lights kept cutting out before a trip. The voltage readings were spot on instead of the guessing game my old test light gave me. Found the bad connection in one pass.

Marcus D.Verified Buyer
Thomas K.

I was skeptical another cheap tester would work on my diesel truck's 24V system. FaultLynk proved me wrong within the first test, it handled everything from my truck to my son's motorcycle without a hitch.

Thomas K.Verified Buyer

Frequently Asked Questions

verified +347 experts reviewed it as the best choice in 2026
Q1 Can I use this on a 24V truck?
Yes — FaultLynk reads both 12V and 24V systems, so the same tester covers your daily driver, a heavy-duty truck, or a motorcycle without switching tools.
Q2 Can I test a modern car without frying the computer?
FaultLynk's protection circuitry blocks shorts and reverse polarity, so probing a connector on a computer-controlled vehicle won't send a stray signal into sensitive modules the way a misused jumper wire can.
Q3 How do I check for a short circuit or open wire?
Switch to resistance mode and probe both ends of the circuit. A steady low reading means the wire is intact, while an open shows infinite resistance and pinpoints where continuity breaks.
Q4 What voltage range does FaultLynk actually support?
FaultLynk is built for 12V and 24V systems, covering cars, motorcycles, and heavy-duty trucks. If your setup runs outside that range, check its rating before connecting.
Q5 Do I need to charge or replace a battery?
No separate battery required. FaultLynk draws power directly from your vehicle's battery or a cigarette lighter socket, so it's always ready when you are.
Q6 Can I use it to test trailer wiring?
Definitely. You can energize trailer light circuits solo and instantly confirm every connection is working, no second person required.
Q7 How is this different from a cheap test light?
A basic test light just lights up if there's any power, even through a corroded connection. FaultLynk shows the exact voltage on a display, so you see the real reading instead of guessing.
Q8 Does it check voltage, resistance, and continuity, or just power?
All three. The Mode button switches between DC voltage, AC voltage, resistance, and diode testing, so one probe handles voltage checks, continuity, and component testing.
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