TM 10-3930-659-20 6-58. UNDER CAB WIRING HARNESS MAINTENANCE Con't). 8. Install under cab wiring harness (10) and cab ground terminal lead (11) on cab (9) with washer (12) and screw (13). 9. Connect  two  under  cab  wiring  harness  connec- tors (7) to right low brake pressure switch (8). TA707869 6-199