TM-9-2320-260-34-2
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 2 OF 2
JULY 1994
TM-9-2320-260-34-2 - Page 309 of 863
TM 9-2320-260-34-2
15-66. HEATER WIRING HARNESS REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
lNITIAL SETUP
APPLICABLE MODELS
M820, M820A1, M820A2
TEST EQUIPMENT
Multimeter (Appendix B, Item 115)
TOOLS
General mechanic’s tool kit
(Appendix B, Item 1)
Tool kit, electrical (Appendix B, Item 106)
MATERIALS/PARTS
Safety wire (Appendix D, Item 372)
Electrical tape (Appendix C, Item 51)
REFERENCES (TM)
TM 9-2320-260-10
TM 9-2320-260-20
TM 9-2320 -260-34P-2
EQUIPMENT CONDITION
●
External power source disconnected
(TM 9-2320-260-10).
●
Battery ground cable disconnected
(TM 9-2320-260-20).
●
Ceiling filler and side panels removed
(M820, M820A2) (para. 15-44).
●
Ceiling removed (M820A1) (para. 15-36).
CAUTION
Use care when replacing wiring harness. Excessive snagging or
pulling may cause damage to wiring harness.
a. Removal
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
NOTE
Tag wires, cables, and leads for installation.
Remove twelve screws (5) and clamps (6) from van ceiling (1).
Disconnect two plugs (2) from heater (3).
Remove two grommets (4) from van ceiling (1).
Remove thermostat cover (12) from thermostat (10).
Remove two screws (11) from thermostat (10) and control center box (8). Pull thermostat (10)
forward.
Remove two screws (13) and wires (9) from thermostat (10) and remove thermostat (10) from control
center box (8).
Remove six screws (14) and cover (15) from load center (20).
Remove screw (16) and clamp (17) from mounting plate (18).
Remove setscrew (24) and wire (25) from neutral bar (26).
Remove screw (22) and wire (23) from 20-amp circuit breaker
(21).
NOTE
●
Safety wire will be used to install new wiring harness. Do not
cut safety wire from spool until wiring harness has been pulled
through and proper length has been obtained.
●
Safety wire must be attached to wires with electrical tape.
Remove heater wiring harness (7) from van body (19).
15-248
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