If you wire your winch directly to the ignition wire you may overload the ignition wiring and burn it up.This is because the winch will probably draw much more amperage than the ignition wiring is designed for.The correct way is to wire the winch through a solenoid directly to the battery.The solenoid is then hooked to the ignition wiring so it will only allow the winch to get power with the ignition in the on position.