TM 9-2350-256-20 CHAPTER 6: MAINTENANCE OF ELECTRICAL SYSTEMS AND CIRCUITS 6-74 REPLACE/REPAIR BULKHEAD TO ENGINE BRACKET AND REAR FUEL TANK TRANSMITTER WIRING HARNESS (SINGLE VOLTAGE) (11671789) THIS TASK COVERS a.  Removal b.  Disassembly c.  Assembly d.  Installation INITIAL SET-UP Tools: Equipment Condition: Tool kit, general mechanic's (Appendix C, item 53) Air inlet doors removed as necessary (see paragraph 9-56) Parts: Lockwashers (16) (Appendix G, item 116) WARNING Be certain MASTER switch is OFF when working on electrical systems to avoid electrical shock and bums. Connector No. Electrical Lead To: Wire No. 1 Bulkhead disconnect B-GND, 31, 509, 324, 321, 33, 36, 627 2 Rear fuel tank transmitter 31 3 APU and main engine armature relays to voltage regulator B-GND wiring harness (single voltage) 4 Switching relay box 478, D, 1 5 Batteries to master relay, voltage regulator, slave receptacle, K and engine disconnect wiring harness (single voltage) (11671791) 6 Batteries to master relay, voltage regulator, slave receptacle, 14 and engine disconnect wiring harness (single voltage) (11671791) 7 Batteries to master relay, voltage regulator, slave receptacle, C and engine disconnect wiring harness (single voltage) (11671791) 8 Main engine disconnect 509, 324, 321, 33, 36, 627, 486, 54, D, 478, 1, 26 9 Bulkhead to APU, master relay, and rigger's lights wiring 26 harness (single voltage) 10 Bulkhead to main engine wiring harness and starter relay 1 wiring harness 11 Bulkhead to main engine wiring harness and starter relay 1 wiring harness 12 Bulkhead to main engine wiring harness and starter relay C wiring harness 13 Bulkhead to main engine wiring harness and starter relay 14 wiring harness 14 Bulkhead to main engine wiring harness and starter relay 486 wiring harness 15 Bulkhead to main engine wiring harness and starter relay 54 wiring harness 16 Circuit breaker K 6-190