If an electric vehicle cannot start after being exposed to rain, the following steps can be followed for troubleshooting and handling:
1. Check the controller and connecting wires
Controller power-off system circuit water ingress fault: Turn off the power of the electric vehicle, check the yellow green intersecting wires on the controller. If water accumulation is found, dry it with a fan and reconnect it.
Loose or detached controller connection wire: Reconnect the controller connection wire to ensure a secure connection.
Poor contact or internal damage of the controller: If the controller is severely flooded or has poor contact, it is recommended to replace the controller.
2. Check the battery and power circuit
Low battery power: Check if the battery has water ingress. If water ingress occurs, it may cause a significant decrease in battery power or leakage. The battery needs to be charged or replaced with a new one.
Loose battery connection wires or poor contact of power lines: Check if the battery terminals are loose or corroded. If there are any problems, have a professional inspect the circuit.
Rusting or corrosion of battery connectors: Clean the rust on the connectors or replace the battery connection wires.
3. Check other components and functions
Low voltage protection device activation: Try restarting the electric vehicle multiple times or turning on the safety switch at the battery connection to release the low voltage protection.
Speed control lever malfunction: Check if the connecting wire of the speed control lever is faulty. If there is a problem, replace the connecting wire or the entire lever.
Motor water ingress: Motor water ingress may cause internal short circuits, and the motor needs to be replaced or repaired.
Poor or aging circuit contact: Check whether the wiring harness of the electric vehicle is worn or aged, and if there is a problem, replace the wiring harness in a timely manner.
Brake malfunction: Check if the electric vehicle's brake system is stuck or has other issues. If there are any problems, go to a professional repair shop to adjust the brake tightness or replace the brake cable.
By following the above steps one by one to troubleshoot and handle, the problem of electric vehicles being unable to start after being exposed to rain can usually be solved. If the problem is still not resolved, it is recommended to contact professional maintenance personnel or electric vehicle brand after-sales service centers for further inspection.