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Car Voltage Detector Fault Circuit Tester

35 reviews
100% of buyers enjoyed this product! 1965 orders
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●Models: HT86A
●Display: LCD display
●Range of voltage detection: DC 0.8~100V
●Power Supply: 1*1.5V AAA battery(not included)
●On off detection: 2000Ω/less than 50Ω, buzzer prompt
●Automatic shutdown: Yes
●Undervoltage indication: Yes
●Buzzer prompt: Yes
●Backlight: Yes
●Flashlight: Yes

1. Multi-function real-time detection: DC Voltage detection, On-off testing, Resistance test, data hold.
2. Compact body and easy to carry.
3. Voltage detection: The HT86A Detect the DC voltage, the HT86B can detect DC AC voltage
4. On-off testing, Find break points: If the wire resistance is below 500Ω, the buzzer will be prompt.
5. HD LCD backlight screen: High definition LCD display, suitable for measurement in various environments.
6. LED lighting function: Provides lighting in dark environments.
7. Auto power off: The pen will shut down automatically if there is no operation after a few minutes.

Measuring Range:
DC voltage detection: 2.000V/20.00V/100V (OL will be displayed if>110V)
Resistance test: 2000Ω /20.00KΩ /200.0KΩ /2.000MΩ /20.00MΩ

The fuse or circuit can be tested under the following conditions:
1. Fog lights don’t work
2. The car horn doesn’t work
3. The headlights don’t work
4. The car won’t start
5. Car navigation does not work
6. The air conditioner doesn’t work
7. The skylight does not open
8. The air conditioner doesn’t work
9. Cigar lighter does not work
10. Backup lamp does not work
11. The stereo does not work
12. Turn signal lamp does not work


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:
Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
Asia 10-20 Business days
Africa 15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
  • If you received the wrong item you can request a refund or a reshipment.
  • If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.

We do not issue the refund if:

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

Real customer reviews

35 reviews
100% of buyers enjoyed this product!
5 stars
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1 star
verifed buyer
23 Feb 2024

For automotive work, it is very useful and it works very well. I recommend!

verifed buyer
23 Feb 2024

Actually pretty good tool and the price is great. Use it daily in the automotive world. Would highly recommended

verifed buyer
23 Feb 2024

Circuit Tester work great.

verifed buyer
23 Feb 2024

The store is perfect. Thank you

verifed buyer
22 Feb 2024

Worked as advertised.

verifed buyer
22 Feb 2024

This listing is for 7 different items, and you pick one of them to order. Regardless of which product you buy, your review is included with reviews by others who bought a different product. For example, I bought a automotive voltage tester, which does not use an internal battery. Other folks bought a continuity tester, which does use an internal battery. Thus the confusion in both questions and reviews about whether the device contains a battery. My voltage tester works just fine. A voltage tester does not have an internal battery. A continuity tester requires an internal battery to send electrons through a circuit to test it. The voltage tester I selected is much smaller than the typical garage unit. A smaller and easier to handle tester was exactly what I wanted.

verifed buyer
22 Feb 2024

I needed a circuit tester to check the fuses in my automotive fuse box. This tool was literally perfect since I didn't need to know exact values, all I needed to know was whether the current was flowing or not. It was extremely easy to use, and really satisfying to have the little light turn on. I had struggled for a while to install my dash cams in my car, but after buying this I hooked them up in about half an hour. Definitely worth it.

verifed buyer
21 Feb 2024

Looks like this is only one device on the market, which can track 12V DC for automotive needs. This is a contact probe, however you don't need to clamp a wire to the ground as all other models. would require. Good for the price.

verifed buyer
21 Feb 2024

Much better than 7764, easier to read, better ground cable, and reads grounds

verifed buyer
21 Feb 2024

Works as advertised. I used this on landscaping lights and it helped me detect the faulty wire

verifed buyer
20 Feb 2024

The quality is super. I recommend it.

verifed buyer
19 Feb 2024

Does what it is supposed to do. Recommend.

verifed buyer
19 Feb 2024

When working with low voltage controls it’s quicker and easier than a meter

verifed buyer
19 Feb 2024

Fast shipping, great store! Thanks! Tomi.

verifed buyer
18 Feb 2024

I had an "Ideal" brand of this 20+ years ago and I loved it for my trouble shooting work. This one is almost identical. And it works perfect for me.

verifed buyer
17 Feb 2024

Perfect size and ease of use!

verifed buyer
17 Feb 2024

Worth buying again

verifed buyer
17 Feb 2024

Many times we need just a simple tool to just find out if we have a good circuit. This tool fulfills that need quite well and is especially easy to use

verifed buyer
15 Feb 2024

Product received quickly it is interesting to detect the phase on a switch in seconds

verifed buyer
15 Feb 2024

just what I needed

verifed buyer
14 Feb 2024

I like the one I have, so I bought this one for my son. Mine works well. It shows the voltage in green if negative, positive is shown in red.

verifed buyer
14 Feb 2024

Good store. I recommend it.

verifed buyer
14 Feb 2024

I have purchased more than 100 of these tester. 100% effective

verifed buyer
13 Feb 2024

Slightly fatter than the one sold by snapon, but it's a third of the price, and has a bigger screen compared to the snapon one.

verifed buyer
13 Feb 2024

Fine product to use for test low voltage

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