This item is a battery checker tester for 9V, D type, C type, AA, AAA, button battery. With it you can easily get the current volt of the tested battry, and know which batteries to keep and which to throw, place your battery between the two points of the battery tester, and the pointer display will indicate that whether there is a battery need to be replaced.
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【Easy Testing Process】: Connect 7 pin trailer tester plug and trailer light tester, press the yellow button of the tester. if the lights are on, the circuit is working properly; if they are not on, the circuit may have a wrong connection or malfunction.
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Easy to Use: You only need to plug the wiring tester into a 7‑blade RV trailer plug, which is suitable for most vehicles with a 7‑pin vehicle side socket. Multifunction: This 7‑way trailer wiring tester can test tail, brake, reverse, turn signal, brake and auxiliary power.
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【Function】Easily test both 4 pin and 7 way Trailer Connector Tester with this versatile 2 in 1 trailer light tester, simplifying trailer circuit checks on most trucks. 1 Trailer Light Tester. 【Adapter Compatibility】Effortlessly convert your vehicle’s 7 pin output to a standard 4 pin flat adapter, making it simple to connect and test 4 way trailer light plugs.
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【Function】Easily test both 4 pin and 7 way Trailer Connector Tester with this versatile 2 in 1 trailer light tester, simplifying trailer circuit checks on most trucks. 1 Trailer Light Tester. 【Adapter Compatibility】Effortlessly convert your vehicle’s 7 pin output to a standard 4 pin flat adapter, making it simple to connect and test 4 way trailer light plugs.
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Any circuit abnormalities are clearly displayed, enabling quick troubleshooting. Versatile Compatibility: Designed for use with a wide range of vehicles, this trailer connector tester operates at 12V-24V, making it suitable for cars, trucks, caravans, RVs, trailers, and more.
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【Function】Easily test both 4 pin and 7 way Trailer Connector Tester with this versatile 2 in 1 trailer light tester, simplifying trailer circuit checks on most trucks. 1 Trailer Light Tester. 【Adapter Compatibility】Effortlessly convert your vehicle’s 7 pin output to a standard 4 pin flat adapter, making it simple to connect and test 4 way trailer light plugs.
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【Function】Easily test both 4 pin and 7 way Trailer Connector Tester with this versatile 2 in 1 trailer light tester, simplifying trailer circuit checks on most trucks. 1 Trailer Light Tester. 【Adapter Compatibility】Effortlessly convert your vehicle’s 7 pin output to a standard 4 pin flat adapter, making it simple to connect and test 4 way trailer light plugs.
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