Takes the guesswork out of trailer wiring diagnosis. Works with both the common 7-way and 4-way flat trailer plugs found on most SUVs, trucks, trailers, and RVs. If the LED lights illuminate, you know the problem is not the vehicle.
Tests:
LT — Left Turn/Brake (9 o'clock)
TM — Tail/Marker Lights (11 o'clock)
RT — Right Turn/Brake (3 o'clock)
12V — Charge Terminal (1 o'clock)
BK — Electric Brake Controller Output (5 o'clock)
BU — Backup Lights (center pin)
GND — Ground (7 o'clock) — tester requires ground to function
Features:
Tests 7-way and 4-way flat trailer plugs
Confirms 12V power supply (for battery charging and cargo trailer interior lights)
Checks electric brake controller output
Quantity
Couldn't load pickup availability
Please note: For the safety of your project, we do not allow returns on any electric, hydraulic, obsolete or magnetic items. This includes lights, adapters, plugs and brake magnets.
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