How to test whether the motorcycle engine accessories have leakage: To test whether there is leakage possibility in the car wiring, only remove the negative pole, connect the red probe to the battery terminal, and connect the black probe to the negative pole terminal. Measure with current gear, if the display is 0. It means that the car has no electric leakage. If it is displayed as other numbers, it may have electric leakage. Usually, the motorcycle may have electric leakage due to the problem of the motorcycle clutch accessories rectifier. If it is displayed as possible for electric leakage, you can remove the motorcycle rectifier and try again.If there is leakage, unplug the plugs of each electrical appliance in the vehicle harness one by one, and measure whether the fault has been eliminated. If the plug is unplugged, it is the problem of which motorcycle engine accessories will no longer leak.