For any type of trailer, part of towing responsibly is making sure your trailer lights are working properly. With heavy-duty trailers, such as a large boat trailer or 5th wheel camper, that responsibility is even greater. Giving safety its proper priority is easy with the CURT 7-way RV blade trailer brake controller tester. This sophisticated towing electrical tester plugs into any 7-way RV blade socket and allows you to check your vehicle wiring for battery voltage, brake voltage and signal circuits. The CURT 7-way RV blade brake controller tester accurately measures the brake and battery voltage output at your 7-way connector. It features a volt meter and a current meter for testing brake power and allows you to test the power output of your trailer brake controller unit. The 7-way brake controller tester can be used for trailers with two or more axles, and because it uses a special ma