TM 9-2320-280-20-3
b. Installation
12-68. SWINGFIRE HEATER HARNESS ASSEMBLY REPLACEMENT (Cont’d)
8. Remove three tiedown straps (15) from harness assembly (5) and vent line and right hand
cowl (16). Discard tiedown straps (15).
9. Remove nut (19) from lead GND (4) and negative battery terminal (18) inside battery box (17).
10. Disconnect GND (4) from negative battery terminal (18) and lead 81A (6) from circuit breaker (20).
11. Guide harness assembly (5) out through hole in battery box (17) and remove harness assembly (5)
from vehicle.
CAUTION
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Use care when routing harness. Failure to do so will cause damage
to harness.
Position harness assembly (5) on right hand cowl (16) along right hand frame rail and vent line and
secure with three tiedown straps (15).
Guide harness assembly (5) through hole in battery box (17) and connect lead 81A (6) to circuit
breaker (20) inside battery box (17).
Connect GND (4) to negative battery terminal (18) with nut (19).
Connect GND (4) and lead 81G (8) to heater pump leads (12).
Install harness assembly (5) under air horn bracket (13) with tiedown strap (14).
Install harness assembly (5) across “A” beam (11) with three tiedown straps (10).
Install grommet (3) to cowl (2).
Guide harness assembly (5) through grommet (3).
Connect lead 81A (6) to lead 81B (7).
Connect GND (4) and lead 81G (8) to relay (1) with two screws (9).
12-100
