Professional load test function enables quick identification of battery and circuit load capacity, aiding in aging battery and weak connection detection
Dual-color backlighting and polarity protection provide instant, intuitive feedback to prevent reverse connections and protect sensitive electronics
Backlit digital display ensures clear, easy-to-read measurements in any lighting condition
12.5 ft oil-resistant test cable and interchangeable 4mm banana plug probes offer extended reach and flexible testing across vehicles
Integrated protections including overvoltage alerts, overheating warnings, and component status monitoring enhance safety and reliability
Summarized by Shop
The CT100 is a professional automotive circuit tester built for speed, accuracy, and everyday reliability. It helps diagnose electrical issues quickly, identifies polarity, runs load tests, and provides clear audible and visual alerts to take the guesswork out of repairs.
Built rugged with a long oil-resistant cable and interchangeable pro
Voltage measurement range
DC 3.3 V to 65 V
Load test range
DC 5 V to 30 V, 1.2 A max
Measurement accuracy
3.3 V to 60 V: 0.1 V; 60 V to 65 V: 0.2 V
Display
Backlit digital LCD
Test cable length
12.5 ft (oil-resistant)
Probe connector
4 mm banana plug
Supported vehicle systems
12V, 24V, 36V
Summarized by Shop
4.7
18 ratings
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1
Rock and roll
Looks good,definitely not cheap plastic,didn’t have to use it yet,the display is not the greatest ,they can make it little bit brighter,
A
anguel · August 24, 2026
I just had a first time use of it today works flawlessly planning on buying another one for my Home shop
J
james · 19 days ago
This load tester is very easy to use and get readings on the circuits you are working with.
