Title
TOPDON CT100 Automotive Circuit Tester, 5-30V Professional Load Testing 3.3V-65V

PRODUCT DESCRIPTION

Please Note:

a)Import duties, taxes and charges are not included in the item price or shipping charges.These charges are the buyer’s responsibility.

b)Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.


TOPDON CT100 Automotive Circuit Tester, 5-30V Professional Load Testing, Measurement Range: 3.3V-65V, Accuracy up to ±0.1V, 12.5 ft Extends


Product Introduction:

The CT100 is a professional automotive circuit tester built for speed and accuracy. It helps diagnose electrical issues, identifies polarity, and provides clear alerts. Built rugged with a long cable and interchangeable probe, it works on various vehicles. Fast, precise results for pros and DIYers.

 

Product Highlights:

5-30V Professional Load Testing

Polarity Detection

Measurement range: 3.3V-65V

Accuracy up to ±0.1V

Sound Alert

Supported Models: Trucks, Sedans, SUVs, Motorcycle, RV


2.jpg

Product Features:

Compact, Lightweight, Easy to Use

The CT100 is compact, lightweight and easy to carry for everyday diagnostics. The 12.5-foot extended test lead gives you greater reach without constantly repositioning, while universal 4 mm banana plugs support DIY accessories and compatibility with most standard probes and clips.


3.jpg

Professional Load Test
The built-in professional load test function supports DC 5–30V circuits with up to 1.2A output and activates with a simple press-and-hold operation. It monitors real-time voltage drop to help identify weak batteries, poor connections, and internal circuit faults—enabling fast, accurate, and reliable diagnostics for automotive electrical systems.
DC: 5–30V  Max: 1.2A

Precise Voltage Measurement
The CT100 measures 3.3–65V DC with dependable accuracy across a broad range of automotive electrical systems. It delivers ±0.1V accuracy from 3.3–60V and ±0.2V accuracy from 60–65V, helping technicians diagnose circuits, batteries, and electrical components with greater confidence.

Automatic Polarity Identification
The CT100 automatically detects positive and negative polarity using color-coded backlight indicators(red for positive connection, green for reverse connection) and clear ± symbols on the display. This instant visual confirmation helps prevent reverse connections and protects sensitive vehicle electronics during testing.

Clear Digital Voltage Readout
The high-contrast digital display shows real-time voltage and polarity clearly. The 0.1V resolution readout delivers direct, accurate data at a glance for fast, intuitive diagnosis.

Professional Audible Buzzer Alerts
Distinct audible alerts indicate startup status, reverse connection warnings, active load testing, and overvoltage or overheating conditions—allowing technicians to monitor circuit status without checking the display.

Intuitive Status Light Indicators
Color-coded backlight indicators confirm polarity instantly, while additional alerts display overvoltage (“H”), overheating (“Hot”), and lamp abnormality (“ER1”) status—keeping key operating conditions visible at a glance during testing.


4.jpg

Built for a Wide Range of Automotive Electrical Tasks

Tackle diverse testing and diagnostic jobs with one professional tool.

 

DIY Automotive Enthusiasts

Vehicle electrical system testing, battery condition checks, circuit troubleshooting, and basic wiring diagnostics

 

Auto Repair Shops

Daily electrical inspections, load testing, fault detection, and routine vehicle maintenance support

 

Technical Training & Education

Circuit principle demonstrations, polarity identification training, voltage measurement practice, and hands-on learning.

 

Professional Automotive Technicians

On-site vehicle fault diagnosis, fleet system maintenance, electrical verification, and in-depth circuit analysis


5.jpg

Why Choose TOPDON CT100?

Professional Load Test with Precise Results

Intelligent Audio-Visual Indicator System

Versatile Compatibility & Extended Reach


Package includes:

1pc x  TOPDON CT100 Main Unit


    If there is any problem, please contact with us by eBay message First, we will reply you within 48 hours,.

    Sorry for delay reply on weekend.



    Welcome to visit my store underrepair2020

    1.We only accept paypal.

    2.Please make payment within 7 days after auction ended, if not,we have to open an unpaid cace to get our final value fee back from ebay.

       So please contact us timely before we take this action.Thanks!

    3.We don't responsible for any custom duty or import cost.

    4.Please tell us the value/name of the item you want for custom delaration if you have any special requirement,or we will fill the custom

       declaration which is suitable for most countries accordingly.

    1. We ship to WORLDWIDE .

    2. Item will be shipped out within 1 working days (except weekends and holidays) 

    after the payment is cleared or received.  

    We will send item to your Confirmed Shipping Address in Paypal. 

    3. If you would like to post to other address , 

    please timely leave us a note when making payment through Paypal.

    We will NOT be responsible for any delivery failure due to unclear,

    unconfirmed or incomplete addresses given.  

    4. We ship by Singapore Post, HongKong Post, E-Packet, DHL/EMS, 

    exact delivery time varies by shipping methods and your location. 

    Usually the standard service delivery takes 15-20 working days (except weekends and holidays),   

    If you don't receive the item after the 30 days, please contact us freely, 

    we'll try our best to solve the delivery problem.    

    Item may be returned for refund or replacement within 30 days of the purchase date.Returned merchandise must be unused, in original packaging and include all accessories.Shipping costs are non-refundable.Defective products may be returned for repair up to 1 year from the purchase date.

    Repairs will be processed through the manufacturer, we will assist in the repair procedure in any way we can to expedite the process.

    Customer Service is not available on Saturday afternoon & Sunday.

    1. If any problem, pls feel free to contact us through "My message'' or "ask seller question".

    2. We are in different time zones, during the working time, 

       we will reply your email within 24 hours. 

    3.If we can not reply to you, maybe we are not in office or we don't receive your letter,

      so pls send it again! Your satisfactory is our top concern.

     We sincerely apologize for the inconCustomer Service

    venience caused by time difference.


    Step1: Leave the Posivive rating

      Step2: Leave your comments about this deal

      Step3: Choose the five star rating for every detailed, 

    it's very important for us.


       Item as described                            

       Communication                                 

       Shipping time                                  

       Shipping and handling charges 

    Welcome to our eBay store: supershop2050!

    We sell OBD2 Auto diagnostic tool and professional automotive

    mechanics with Top Quality,Good Service,Competitive Price,

    such as super vag k+can,MVCI,Mini Vci,Ak90 etc.

     High product quality, reasonable prices, 

    excellent customer service and a reliable credit standing is our tenet. 

    Please sign up by adding our eBay shop to your "My Favorite Sellers and stores" list.

    Please come back soon and visit us again!


    Wish You a Happy Online Shopping!


About Us

If there is any problem, please contact with us by eBay message First, we will reply you within 48 hours,.

Sorry for delay reply on weekend.



Welcome to visit my store underrepair2020

Payment

1.We only accept paypal.

2.Please make payment within 7 days after auction ended, if not,we have to open an unpaid cace to get our final value fee back from ebay.

   So please contact us timely before we take this action.Thanks!

3.We don't responsible for any custom duty or import cost.

4.Please tell us the value/name of the item you want for custom delaration if you have any special requirement,or we will fill the custom

   declaration which is suitable for most countries accordingly.

Shipping

1. We ship to WORLDWIDE .

2. Item will be shipped out within 1 working days (except weekends and holidays) 

after the payment is cleared or received.  

We will send item to your Confirmed Shipping Address in Paypal. 

3. If you would like to post to other address , 

please timely leave us a note when making payment through Paypal.

We will NOT be responsible for any delivery failure due to unclear,

unconfirmed or incomplete addresses given.  

4. We ship by Singapore Post, HongKong Post, E-Packet, DHL/EMS, 

exact delivery time varies by shipping methods and your location. 

Usually the standard service delivery takes 15-20 working days (except weekends and holidays),   

If you don't receive the item after the 30 days, please contact us freely, 

we'll try our best to solve the delivery problem.    

Returns

Item may be returned for refund or replacement within 30 days of the purchase date.Returned merchandise must be unused, in original packaging and include all accessories.Shipping costs are non-refundable.Defective products may be returned for repair up to 1 year from the purchase date.

Repairs will be processed through the manufacturer, we will assist in the repair procedure in any way we can to expedite the process.

Customer Service

Customer Service is not available on Saturday afternoon & Sunday.

1. If any problem, pls feel free to contact us through "My message'' or "ask seller question".

2. We are in different time zones, during the working time, 

   we will reply your email within 24 hours. 

3.If we can not reply to you, maybe we are not in office or we don't receive your letter,

  so pls send it again! Your satisfactory is our top concern.

 We sincerely apologize for the inconCustomer Service

venience caused by time difference.


Feedback

Step1: Leave the Posivive rating

  Step2: Leave your comments about this deal

  Step3: Choose the five star rating for every detailed, 

it's very important for us.


   Item as described                            

   Communication                                 

   Shipping time                                  

   Shipping and handling charges 

About Us

Welcome to our eBay store: supershop2050!

We sell OBD2 Auto diagnostic tool and professional automotive

mechanics with Top Quality,Good Service,Competitive Price,

such as super vag k+can,MVCI,Mini Vci,Ak90 etc.

 High product quality, reasonable prices, 

excellent customer service and a reliable credit standing is our tenet. 

Please sign up by adding our eBay shop to your "My Favorite Sellers and stores" list.

Please come back soon and visit us again!


Wish You a Happy Online Shopping!


PaymentShippingReturn policyAbout usContact us

Copyright © - Tongtool All rights reserved | Design:Tongtool

100% Genuine
High Quality
Fast Shipping
tongtool