1. This 7-pin to 12V power adapter converts a 7-way flat plug into a 4-way or 5-way trailer connection, and also converts a 7-way plug into a 12V cigarette lighter socket.
2. Can be used to power air compressors, searchlights/floodlights, inverters, refrigerators, and electric coolers in the back of a truck.
3. Places the 12V outlet where you need it, plugs it in, and its much easier than running wires from the battery to the truck bed.
4. Used to check the connections of the taillights, brake lights, reverse lights, turn signals, electric trailer brakes, and auxiliary power. Bright LED indicators make it easy to identify faulty wiring.
5. Note: some models may not have a relay in this location to operate the 12V power supply. If your 12V plug isnt working, check the fuse box and install a relay fuse.
6. Note: this adapter is not suitable for vehicles with a lights-out sensor.