78118 - 7 to 4/5 Circuit Tester 78118
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Trailer Wiring and Lighting
Reese 7-way Blade To 4 Or 5-flat W/led Circuit Tester
Easily adapt OEM 7-way blade connector to either 5-flat or a 4-flat connector, patent pending. Instantly checks electrical circuit for connectivity. Displays connectivity using high visibility blue LEDs. Attached dust cover included to keep terminals clean when not towing a trailer.