TM 9-2320-361-34 15-25. BLACKOUT SWITCH REPLACEMENT THIS TASK COVERS: a. Removal b. Installation lNITIAL SETUP APPLICABLE MODELS MATERIALS/PARTS M185A3 and M109A3 Six lockwashers (Appendix F, Item 151) TEST EQUIPMENT Multimeter (Appendix B, Item 3) TOOLS General mechanic’s tool kit (Appendix B, Item 1) Tool kit, electrical (Appendix B, Item 2) Pipe wrench (Appendix B, Item 39) REFERENCES (TM) TM 9-2320-361-10 TM 9-2320-361-20 TM 9-2320-361-34P EQUIPMENT CONDITION ● Parking brake set (TM 9-2320-361-10). ● Battery ground cable disconnected (TM9-2320-361-20). a. Removal NOTE Tag wires, leads, and terminals for installation. 1. Remove four screws (3), lockwashers (4), and cover (1) from blackout switch (2). Discard lock- washers (4). 2. Remove five screws (8), lockwashers (7), and wires (5), (6), (9), (10), (11), (12), and (13) from blackout switch (2). 3. Remove bushing (16) from nipple (15). 4. Remove two nuts (17), lockwashers (18), and blackout switch (2) from mounting bracket (14). Discard lockwashers (18). b. Installation 1. Install blackout switch (2) on mounting bracket (14) with two new lockwashers (18) and nuts (17). 2. Install blackout switch (2) on nipple (15) with bushing (16). 3. Install wires (5), (6), (9), (10), (11), and one end of (12) on blackout switch (2) with four lock- washers (7) and screws (8). 4. Install wire (13) and other end of wire (12) on blackout switch (2) with lockwasher (7) and screw (8). 5. Install cover (1) on blackout switch (2) with four new lockwashers (4) and screws (3). 15-100