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doublehelixx | Staff 29.9K Views
Sep 9, 2026 4:30 PM

VSTM DC 6-42V Automotive Wire Tracer & Open/Short Circuit Finder

$21

$40

47% off
+ Free S&Hat Amazon
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Update: This popular deal is still available.

VSTM US via Amazon has VSTM DC 6-42V Automotive Wire Tracer & Open/Short Circuit Finder on sale for $37.99 - 45% with promo code UC6C7PWQ = $20.89. Shipping is free.

Note: You must be logged in to clip coupons and apply promo codes. If a code doesn't work right away, try applying it a few times across different interfaces such as mobile or desktop, as some codes may not apply consistently. If issues persist, refresh the page, re-enter the code, or revisit the cart before checking out.

Thanks to Deal Hunter doublehelixx for finding this deal.

Features:
  • This professional DC 6-42V circuit tester is a must-have for automotive repair, home wiring, and industrial maintenance. It effortlessly locates circuit breakers, traces broken wires, detects current leaks, and tests continuity—all without damaging wire insulation. The perfect open & short finder for electricians, DIYers, and auto technicians to solve electrical faults in minutes.
  • Equipped with a high-sensitivity transmitter and receiver, this circuit breaker finder tool delivers crystal-clear test results via bright LED lights and distinct beeping tones. A built-in low-battery indicator (flashing red light) prevents unexpected shutdowns mid-test. Its anti-interference design eliminates background noise, ensuring you get accurate readings every time with zero guesswork.
  • Easily pinpoint open circuit breakpoints using the adjustable sensitivity feature (3 modes). Set the transmitter to the down position— a flashing green light confirms an open circuit. The receiver emits a full signal and rapid beep in normal areas; the signal weakens or vanishes exactly at the breakpoint for precise fault localization.

Editor's Notes

Written by StrawMan86 | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:

Original Post

Written by doublehelixx | Staff
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Update: This popular deal is still available.

VSTM US via Amazon has VSTM DC 6-42V Automotive Wire Tracer & Open/Short Circuit Finder on sale for $37.99 - 45% with promo code UC6C7PWQ = $20.89. Shipping is free.

Note: You must be logged in to clip coupons and apply promo codes. If a code doesn't work right away, try applying it a few times across different interfaces such as mobile or desktop, as some codes may not apply consistently. If issues persist, refresh the page, re-enter the code, or revisit the cart before checking out.

Thanks to Deal Hunter doublehelixx for finding this deal.

Features:
  • This professional DC 6-42V circuit tester is a must-have for automotive repair, home wiring, and industrial maintenance. It effortlessly locates circuit breakers, traces broken wires, detects current leaks, and tests continuity—all without damaging wire insulation. The perfect open & short finder for electricians, DIYers, and auto technicians to solve electrical faults in minutes.
  • Equipped with a high-sensitivity transmitter and receiver, this circuit breaker finder tool delivers crystal-clear test results via bright LED lights and distinct beeping tones. A built-in low-battery indicator (flashing red light) prevents unexpected shutdowns mid-test. Its anti-interference design eliminates background noise, ensuring you get accurate readings every time with zero guesswork.
  • Easily pinpoint open circuit breakpoints using the adjustable sensitivity feature (3 modes). Set the transmitter to the down position— a flashing green light confirms an open circuit. The receiver emits a full signal and rapid beep in normal areas; the signal weakens or vanishes exactly at the breakpoint for precise fault localization.

Editor's Notes

Written by StrawMan86 | Staff
  • About this deal:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.
  • About this store:

Original Post

Written by doublehelixx | Staff

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Top Comments

SupraSaver
33Comments
14Reputation
A new car is almost 50K. Just buy two crappy cars so as long as one is working you can fix the other one.
Go to Comment
BeautifulMallard801
45Comments
16Reputation
Some of the reviews are for a 30 amp surge protector instead of this device.
Go to Comment
Straightsix9904
141Comments
22Reputation
Tried that before.... might need a third
Go to Comment

Community Reviews

This wire tracer is aimed at finding automotive shorts and tracing circuits, especially when fuse by fuse troubleshooting gets tedious. It can help track intermittent or hard to isolate wiring problems, and it was useful for finding a short in an RV. The meter can also provide voltage and resistance readings, which helps narrow down faults like a stuck float or a draining light. The main limitation is that you still need to identify the right circuit by pulling fuses first, and some Amazon reviews appear to be for a different product.

  • The wire tracer can help locate a short circuit when troubleshooting vehicle wiring problems.

    eazye79

  • The tool can assist with tracing intermittent or chewed wires that switch between full and poor connection.

    DealDady

  • The fuse-transmitter approach can make wire tracing practical when a wiring diagram is unavailable.

    shortprong

  • The device may support faster isolation of parasitic drain issues compared with fuse-by-fuse meter checks on vehicles with many fuses.

    sobitthen

  • A short can still cause parasitic battery drain without blowing a fuse, which makes isolation harder.

    sobitthen

  • The tracer still requires pulling fuses to identify the correct circuit before using the fuse transmitter.

    shortprong

  • Some reviews appear to reference a different product, which can complicate expectations for this specific wire tracer.

    BeautifulMallard801

  • Backprobe pins may not bite through insulation easily, so contact may require forcing the pins.

    NervousHill1486

Common Questions (4)

AI-generated summary based on comments from the community. Updated ago

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37 Comments

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Sep 10, 2026 2:26 PM
586 Comments
Joined Mar 2006
sobitthenSep 10, 2026 2:26 PM
586 Comments

Our community has rated this post as helpful. If you agree, why not thank

Had a similar tool in my cable tracing for networking, see if this is any better. 3 vehicles here have some sort of parasitic drain that normal troubleshooting steps cannot locate. See if this is capable of finding a short to ground or whatever my issue is as winter is coming and tired of disconnecting batteries... did the 1 fuse at a time trick with meter that usually works, some of these newer vehicles have over 100 fuses and it gets time consuming... see what learning curve is on this tool and look for videos... for $20 worth a shot..
2
1
Sep 10, 2026 5:21 PM
141 Comments
Joined Nov 2015
Straightsix9904Sep 10, 2026 5:21 PM
141 Comments
Do I buy this or do I quit buying crappy cars?
18
Sep 10, 2026 7:04 PM
33 Comments
Joined Feb 2017
SupraSaverSep 10, 2026 7:04 PM
33 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from Straightsix9904 View quoted comment :
Do I buy this or do I quit buying crappy cars?
A new car is almost 50K. Just buy two crappy cars so as long as one is working you can fix the other one.
7
2
Sep 10, 2026 7:28 PM
141 Comments
Joined Nov 2015
Straightsix9904Sep 10, 2026 7:28 PM
141 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from SupraSaver View quoted comment :
A new car is almost 50K. Just buy two crappy cars so as long as one is working you can fix the other one.
Tried that before.... might need a third
1
16
Sep 11, 2026 12:29 AM
66 Comments
Joined Jan 2018
Glock19SmithSep 11, 2026 12:29 AM
66 Comments

Our community has rated this post as helpful. If you agree, why not thank

Quote from SupraSaver View quoted comment :
A new car is almost 50K. Just buy two crappy cars so as long as one is working you can fix the other one.
Only if the insurance was half price...
2
2
Sep 11, 2026 9:40 AM
4.5K Comments
Joined Jul 2005
geekwithoutacauseSep 11, 2026 9:40 AM
4.5K Comments
Quote from sobitthen View quoted comment :
Had a similar tool in my cable tracing for networking, see if this is any better. 3 vehicles here have some sort of parasitic drain that normal troubleshooting steps cannot locate. See if this is capable of finding a short to ground or whatever my issue is as winter is coming and tired of disconnecting batteries... did the 1 fuse at a time trick with meter that usually works, some of these newer vehicles have over 100 fuses and it gets time consuming... see what learning curve is on this tool and look for videos... for $20 worth a shot..
Thats unlikely a short or it would blow a fuse. Usually a defective device like a radio that keeps draining power slowly.
Sep 11, 2026 11:57 AM
45 Comments
Joined Dec 2019
BeautifulMallard801Sep 11, 2026 11:57 AM
45 Comments

Our community has rated this post as helpful. If you agree, why not thank

Some of the reviews are for a 30 amp surge protector instead of this device.
5

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Sep 11, 2026 6:30 PM
603 Comments
Joined Apr 2025
DealDadySep 11, 2026 6:30 PM
603 Comments
Quote from geekwithoutacause View quoted comment :
Thats unlikely a short or it would blow a fuse. Usually a defective device like a radio that keeps draining power slowly.
I could see a chewed up wire that oscilates from full connection to crappy connection doing this though.
Sep 12, 2026 12:56 AM
11 Comments
Joined Dec 2008
bdashradSep 12, 2026 12:56 AM
11 Comments
Quote from Straightsix9904 View quoted comment :
Tried that before.... might need a third
Also tried it before, also needed a third
1
Sep 12, 2026 3:57 AM
586 Comments
Joined Mar 2006
sobitthenSep 12, 2026 3:57 AM
586 Comments
Quote from geekwithoutacause View quoted comment :
Thats unlikely a short or it would blow a fuse. Usually a defective device like a radio that keeps draining power slowly.
if the short is minimal and below threshold of the fuse it could still drain power without popping that fuse. There are circuits that use fuseable links that have a high amp rating, but been changing modules tracing wires, pulling fuses each vehicle when multiple panels or added panels is time consuming and with it random on each one here, tough to isolate when not drawing power.
Sep 12, 2026 8:15 AM
40 Comments
Joined Oct 2014
BoD4474Sep 12, 2026 8:15 AM
40 Comments
Quote from sobitthen View quoted comment :
Had a similar tool in my cable tracing for networking, see if this is any better. 3 vehicles here have some sort of parasitic drain that normal troubleshooting steps cannot locate. See if this is capable of finding a short to ground or whatever my issue is as winter is coming and tired of disconnecting batteries... did the 1 fuse at a time trick with meter that usually works, some of these newer vehicles have over 100 fuses and it gets time consuming... see what learning curve is on this tool and look for videos... for $20 worth a shot..
My glove box light stayed on draining the battery so I just removed the bulb
Sep 12, 2026 9:15 AM
4.5K Comments
Joined Jul 2005
geekwithoutacauseSep 12, 2026 9:15 AM
4.5K Comments
Quote from DealDady View quoted comment :
I could see a chewed up wire that oscilates from full connection to crappy connection doing this though.
Im not saying its impossible, it's just very low probability. Search for basics first. Like a light staying on due to bad sensor (door , trunk, glove box etc).
Sep 12, 2026 9:17 AM
4.5K Comments
Joined Jul 2005
geekwithoutacauseSep 12, 2026 9:17 AM
4.5K Comments
Quote from BoD4474 View quoted comment :
My glove box light stayed on draining the battery so I just removed the bulb
Like always, start w the basic stuff. And also google your model.
Sep 12, 2026 11:05 AM
169 Comments
Joined Apr 2014
NearlyFriendSep 12, 2026 11:05 AM
169 Comments
Quote from geekwithoutacause View quoted comment :
Thats unlikely a short or it would blow a fuse. Usually a defective device like a radio that keeps draining power slowly.
3 vehicles have parasitic drain?

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Sep 12, 2026 11:13 AM
169 Comments
Joined Apr 2014
NearlyFriendSep 12, 2026 11:13 AM
169 Comments
Does anyone have an opinion on clipping tight alligator clips to an insulated wire? With most automotive wires being smaller gauge.. i feel like a high likelihood of biting through the insulation like almost certainly.
Anyone direct experience, thoughts?

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