MP1804B 12N 7 Pin Car and Trailer Tester
- 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
