TM   9-2320-273-20 Section II MAINTENANCE ALLOCATION CHART FOR TRUCK, TRACTOR, M915, M916, AND M920 AND CHASSIS FOR M917, M918, AND M919 (Continued). (1) (2) (3) (4) (5) (6) MAINTENANCE GROUP COMPONENT/ASSEMBLY CATEGORY TOOLS  AND NUMBER EQUIPMENT C O F H D 06 ELECTRICAL SYSTEM (Continued) Marker & Turn Signal Lamps Replace 0.3 Clearance  Lamps Replace 0.3 Tail, Brake, Turn Signal, Replace 0.3 Stop, and Backup Lamps Work  Lamps Replace 0.3 916 & 920 Blackout  Head  Lamp Replace 0.3 Blackout Tail & Stop Lamps Replace 0.3 Dome Lamp & Switch Replace 0.3 Instrument   Illumination Replace 0.3 Lamps 0610 Sending Units Fuel Level Replace 0.4 Water  Temperature Replace 0.2 Oil  Pressure Replace 0.2 Transmission  Oil  Temperature Replace 0.2 Switches and Relays High Engine Water Replace 0.2 Temperature Low Engine Oil Pressure Replace 0.2 Low Brake Air Pressure Replace 0.2 Backup Replace 0.2 916-920 0610 Park  Brake  Engaged Replace 0.2 Turn Signal Flasher Replace 0.2 PTO Engaged Replace 0.2 916-920 Neutral Safety Switch Replace 0.2 Differential Lockout Engaged Replace 0.2 Instrument Panel Circuit Replace 0.2 Breakers instrument  Panel  Relays Replace 0.2 0611 Horn Replace 0.4 Horn  Button Replace 0.5 B-10 MAINTENANCE FUNCTION