TM 10-3930-669-20 7-13.  GLOW PLUG SWITCH REPLACEMENT. This task covers: a.  Removal b.  Installation INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Materials/Parts Tags, Identification ( Item 21, Appendix C) Equipment Condition Engine OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) Cab door opened (TM 10-3930-669-10) Batteries disconnected (Para 7-48) a.  Removal (1) Remove four screws (1), upper cover (2), and lower cover (3) from steering column (4). (2) Remove nut (5) and glow plug switch (6) from lower cover (3). NOTE Tag and mark all wires prior to removal. (3) Loosen two screws (7) and remove two wires (8) from glow plug switch (6). 7-29