McCartneyAE TowCheck Trailer Tester
This McCartneyAE TowCheck battery-powered trailer tester provides fast, reliable diagnosis of trailer and vehicle wiring without the need for a tow vehicle. Designed for workshops, auto electricians, fleet operators, and mobile technicians, it allows one-person testing of all common Australian trailer connections.
The tester plugs directly into standard trailer sockets and enables individual activation of indicators, brake lights, tail lights, reverse lights, and auxiliary circuits. Powered by the Milwaukee M18 battery platform, it delivers consistent output and long run time for repeated testing in the workshop or out in the field.
With our TowCheck Adapters, the TowCheck is compatible with the most widely used trailer plugs, this unit helps quickly identify wiring faults, poor connections, and lighting issues—saving time and improving safety.
Compatible Trailer Plugs:
7-pin flat
7-pin round
7-pin large round
12-pin flat
If we don't have what you are looking for, email us and we can make it for you!
Key Features:
Powered by your own Milwaukee® M18 battery
No vehicle required for testing
Individual circuit activation for clear fault diagnosis
Supports common Australian trailer plug configurations
Ideal for workshop, fleet, and mobile applications
Robust, trade-ready handheld design

