Symptom: Golf 1.6 car mileage 5000km, driving the headlamp switch, wiper motor rotation, emergency call lights shining.
     Failure analysis: the battery and the body connected to the ground wire contact is not real, will cause electrical control chaos.
     Troubleshooting: After checking the battery below the ground wire virtual connection is not true, tighten the grounding wire bolts, troubleshooting.