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Today we're going to be taking a look at part number PK12741. This is the Pollack 7-Way to RV Socket LED Circuit Tester. This tester's going to tell you which functions are working in a 7-way trailer connector. All you have to do is plug in the tester. Plug it into a 7-way connector, and then the LED lights are going to indicate which functions are working properly. It's got the indicators right… see more >
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