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Testers & Diagnostic ToolsTesters & Diagnostic Tools

Testers & Diagnostic Tools

From blown lights to fault codes, car diagnostic tools quickly track down issues with your vehicle. Check out how our auto testers can save you time and money.

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  1. 7-Way Blade Trailer Wiring Circuit Tester
    7-Way Blade Trailer Wiring Circuit Tester
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    Price: $4.99
  2. 5-Way Flat Trailer Wiring Circuit Tester
    5-Way Flat Trailer Wiring Circuit Tester
    Price: $2.99
  3. 4-Way Flat Trailer Wiring Circuit Tester
    4-Way Flat Trailer Wiring Circuit Tester
    Price: $2.50
  4. 12/24V DC LED Display Battery/Alternator Tester
    12/24V DC LED Display Battery/Alternator Tester
    Price: $8.99

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Find It, Fix It, Forget About It

Headlights looking a bit dim? Dead battery? Trailer lights not working? Sounds like you may have a failing alternator or a burnt fuse or corroded connectors or a loose chassis ground or...well you get the idea. Instead of losing your mind, blindly chasing an automotive diagnostic code or elusive electrical fault, flush out the problem with purpose-built car diagnostic tools. Whether it’s a bad alternator, bulb, or wire, our auto test equipment can test it, measure it, find it and get you back on the road. Save yourself time and money and check out our exhaustive selection of car testers, meters, and adapters.