TM 10-3930-659-20 5-13. FUEL PRESSURE DIFFERENTIAL SWITCH REPLACEMENT (Con’t). 6. Connect two fuel lines (3) to fuel pressure differ- ential switch (4). 7. Connect two connectors (2) to fuel pressure dif- ferential switch connectors (1). FOLLOW-ON TASKS: • Bleed fuel filter and lines (see paragraph 5- 16). • Close left engine upper sideshield (see TM 10-3930-659-10). TA706871 5-37