TM 9-2320-289-20
11-17. ENGINE COOLANT HEATER WIRING HARNESS REPLACEMENT.
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
Equipment Condition
Materials/parts
• Both battery negative cables disconnected.
• Tie-down straps (Item 44, Appendix C)
(See paragraph 4-38)
a.
REMOVAL
NOTE
• If removing relay (10), perform step 3.
• Tag all leads and connectors for installation.
1.
Disconnect wiring harness connector
( 5 ) f r o m e n g i n e c o o l a n t h e a t e r
t h e r m o s t a t ( 4 ) . R e m o v e e n g i ne
coolant
heater
(1)
cover
and
disconnect wiring harness (2) from
engine coolant heater, Disconnect
wiring harness connector (6) from
cab heater connector (7). Remove
and discard tie-down straps from
wiring harness.
2.
Disconnect wiring harness (2) from cab heater control panel assembly (8). Loosen nut on
strap (9) and disconnect wiring harness.
3.
Remove relay (10) and disconnect from wiring harness (2).
4.
Remove wiring harness (2) and grommet (3) from bulkhead. Retain grommet for installation if
not damaged.
TA50089
11-62
