Maypole 7 Pin Car & Trailer Light Tester MP1804B

12N 7 Pin car and trailer tester for testing ISO1724 /12N 7pin circuits
LED indicators show any faults on the towbar or trailer lighting circuits
Requires 1 x 9V PP3 battery (not included) for testing trailer lighting
Note: Not suitable for use with LED trailer lights
Towbar testing requires ignition to be switched on and each function activated in turn
Indicators will show green when function is tested and correctly wired, or red if a fault is present
Tow Bar Testing Instructions

Plug the tester (?Towbar Check? connection) into the 7 pin towing socket
Switch on the ignition and test each lighting function in turn
LED indicators will show Red when the function tested is correctly wired
Trailer Testing Instructions

Not suitable for use with LED trailer lights
Insert a PP9 ? 9V battery (not included) observing correct polarity
Insert the 7 pin trailer plug into the tester (?Trailer Check? connection)
Press the ?Trailer Check? test button on the side of the tester
LED indicators will show Red when the function tested is correctly wired
If the LEDs do not light up check the internal battery.
If individual LEDs still do not light up, check the plug wiring against ISO1724 ? some lighting circuits may not be connected in all installations.
Finally, make further checks of bulbs and contacts if necessary