If you are having trouble with your electrical and are not sure if it is your dump trailer or truck, here is a quick trick to test your 7 way plug without buying a tester or on a budget.
This also works for non dump trailers.
Grab any conductive two pronged tool and insert it into the top two terminals that are your 12 volt and running light terminals. If your lights turn on, your fuses are good, your battery will charge and your lights work.
www.lamartrailers.com
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