TM 9-2320-361-34 7-3. FRONT WIRING HARNESS REPLACEMENT (Contd) NOTE Perform step 34 if vehicle is equipped with fuel pressure switch. 34. Disconnect wires (40) and (42) from fuel pressure sending unit (41). NOTE Assistant will help with steps 35 and 36. 35. Remove four locknuts (20), screws (32), and clamps (19) from front wiring harness (16) and firewall (1). Discard locknuts (20). 7-23