1 is the power supply
2 Cigarette lighter not used on tractor
3 is connected to the generator regulator and instrument
4 Starting relay
acc should be in the firing line
b The charging cable from the generator or regulator
R1 pre-hot wire
R2 Starting cable
1 is the power supply, 2 is not connected to the smoke lighter on the tractor, 3 is connected to the generator regulator and instrument, etc. 4 Start relay acc should be the firewire b generator or regulator of the charging wire R1 pre-hot wire R2 start wire