TM 10-3930-669-20 NOTE Steps  (3)  through  (6)  below  covers  the replacement   of   all   fuses,   diodes,   and relays R2 and R3. (7) Install diode (6) in fuse panel (4). (8) Install relay (5) in fuse panel (4). (9) Install fuse (3) in fuse panel (4). (10) Install cover (1) on lower dash panel (2). NOTE Follow-on Maintenance: •   Close cab door (TM 10-3930-669-10). •   Remove wheel chocks (TM 10-3930-669-10). END OF TASK 7-73