Fault Phenomenon: General electric forklift after turning off the key, the vehicle still moves slowly, unable to stop.

Troubleshooting Process:
– Checked key switch: switch turned off.
– Checked DC contactor: contacts welded and stuck.
– Checked controller: controller no output.
– Checked wiring: no short circuit.

Root Cause: The main circuit DC contactor contacts are welded together due to high current, unable to open.

Required Parts: DC contactor assembly.