Check the wiring circuit standard (SABS).
Parking brake / ABS / fog light / reversing light / auxiliary wire check and test.
Test 12-volt and 24-volt standard light globes.
Test 12-volt and 24-volt LED lights.
Test the stop light wiring and light bulbs, or LEDs.
Test the left-hand tail light wiring and light bulbs, or LEDs.
Test the right-hand tail light wiring and light bulbs, or LEDs.
Test the left-hand indicator wiring and light bulbs, or LEDs.
Test the right-hand indicator wiring and light bulbs, or LEDs.
Perform a load test on the earth/ground wire.
Earth/ground wire test: the tester will immediately indicate when there is no earth/ground connection. It will also show a swapped earth/ground wire between light circuits or on the auxiliary circuit.
Short circuit test: the easily replaceable fuse on the tester will blow when a short circuit occurs on wires, globes, globe fittings, and damaged plugs or sockets. Refer to the user guide to learn how to safely and adequately test for shorts using this tester.