Automotive Diagnostics, Torque & Trailer Wiring

How does a 7-Way RV Trailer Blade Socket Tester verify tow vehicle electrical outputs?

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 Correct IncorrectIt plugs directly into the round 7-pin bumper receptacle, using individual LEDs to test running lights, left turn/brake, right turn/brake, reverse lights, 12V auxiliary power, and electric brake controller output.

How does a 7-Way RV Trailer Blade Socket Tester verify tow vehicle electrical outputs?

• It tests trailer tire pressure by radio
• It plugs into the 7-way connector to verify the lighting, brake and auxiliary power signals via dedicated diagnostic LEDs
• It measures trailer tongue weight in pounds
• It charges the tow vehicle alternator