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Quantity
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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 ta...
Reviews
4.8
11 ratings
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Very Impressed with the CT100
Great tool! I have other Topdon products, and they have always been great tools. The CT100 is an all-in-one solution. I appreciate the quality and performance.
G
Geovany · 4 days ago
Works good
Very nice product. You can add whatever leads you want thanks to standard banana plugs. The readout is spot on in accuracy. The load test works pretty slick. I haven't really used it, but from what I see it will be a nice tool at a great price.
R
Ron · May 28, 2026
Circuit tester
It is convenient one small tool and you can test power ground 5 volt reference load test the circuit. I work on transit buses we have 12 & 24 volt system on the buses it really is an awesome tool. Once again Topdon you have made a great tool.
