ELECTRICAL SYSTEM KEY DESCRIPTION KEY DESCRIPTION 1 - REVERSE WARNING ALARM 22 - RETURN-TO-DIG SWITCH 2 - ALTERNATOR 23 - RETURN-TO-DIG SWITCH GROUND LEAD 3 - [03H11] ELECTRICAL SYSTEM 9015 444C and 444CH Loader PC1788 in LOADER, FOUR-WHEEL DRIVE 444CH