TM 10-3930-669-20 7-33.  FUSE, RELAY, DIODE, AND BUSS, BAR REPLACEMENT. This task covers: a.  Removal b.  Installation INITIAL SETUP Tools and Special Tools Equipment Condition Tool Kit, General Mechanic's: Automotive Engine OFF (TM 10-3930-669-10) (Item 1, Appendix B) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) Cab door opened (TM 10-3930-669-10) a.  Removal. NOTE Steps (1) through (5) below cover the replacement of all fuses, diodes, and relays R2 and R3. (1) Remove fuse cover (1) from lower dash panel (2). 7-69