TM 9-2320-361-20 14-33. PRIMARY AND SECONDARY HEATER SWITCHES REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: APPLICABLE MODELS EQUIPMENT CONDITION All Parking brake set (TM 9-2320-361-10). REFERENCES (TM) Battery ground cable disconnected (para. 4-48). TM 9-2320-361-10 TM 9-2320-361-20P NOTE Primary and secondary heater switches replacement procedures are the same. a. Removal NOTE Tag all wires for installation. 1. Loosen six screws (6) and remove converter (5) from screws (6) and van wall (7). 2. Remove fourteen screws (14) and cover (15) from converter (5). 3. Remove two screws (18), washers (17), and wires (3) and (19) from HIGH-LOW switch (16). 4. Remove four screws (10), washers (9), and wires (4), (11), (3), and (12) from RUN-OFF-START switch (13). 5. Remove jumper (8) from RUN-OFF-START switch (13). 6. Remove two screws (1), mounting plate (2), and RUN-OFF-START switch (13) from cover (15). 7. Remove two screws (1), mounting plate (2), and HIGH-LOW switch (16) from cover (15). b. Installation 1. Install HIGH-LOW switch (16) and mounting plate (2) on cover (15) with two screws (1). 2. Install RUN-OFF-START switch (13) and mounting plate (2) on cover (15) with two screws (1). 3. Install jumper (8) on RUN-OFF-START switch (13). 4. Install wires (4), (11), (3), and (12) on RUN-OFF-START switch (13) with four washers (9) and screws (10). 5. Install wires (3) and (19) on HIGH-LOW switch (16) with two washers (17) and screws (18). 6. Install cover (15) on converter (5) with fourteen screws (14). 7. Install converter (5) on van wall (7) with six screws (6). Tighten screws (6). 14-52