TM 10-3930-659-20 6-60. ENGINE FRAME WIRING HARNESS MAINTENANCE (Con't). 4. Remove screw (9) and frame ground terminal lead (8) from frame (12). 5. Disconnect hydraulic oil filter restriction switch lead connector (10) from hydraulic oil filter restriction switch lead (11). 6. Disconnect four engine frame wiring harness connectors (14) from engine wiring harness connectors (13). TA707885 6-217