When trying to use the half method from the controller and if the acc2 has an over-current, it will shut itself down (module) and you will not be able to do a wire test from 'decoder diagnostics' down the line. So you definitely have to use an outside 24V transformer to test the line for short or open circuit.
When trying to use the half method from the controller and if the acc2 has an over-current, it will shut itself down (module) and you will not be able to do a wire test from 'decoder diagnostics' down the line. So you definitely have to use an outside 24V transformer to test the line for short or open circuit.