TM 5-3805-298-23-1
0121
Table 1. Condenser Fan(s) Do Not Operate When the Heater A/C Switch Is in A/C Position - Continued.
0121
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 7. Test for Shorted Lower
Condenser Fan(s) Do Not
Cab Wiring Harness.
Operate When the Heater A/
1. Remove right lower cab access
C Switch Is in A/C Position -
panels (WP 0347).
Continued
2. Disconnect connector EN-C2
(WP 0012, Figure 12) from
connector C-C18 (WP 0012,
Figure 13).
3. Using digital multimeter
Continuity Proceed to Test Step 8.
(WP 0174), test for continuity
No Continuity Replace engine wiring
between connector C-C18
harness (WP 0299).
(WP 0012, Figure 13) terminal 6
Proceed to Test Step 33.
and terminal 7.
Test Step 8. Test for Shorted Rear
Frame Wiring Harness.
1. Remove right lower cab access
panels (WP 0347).
2. Disconnect connector M-C1
(WP 0012, Figure 57) from
connector C-C20 (WP 0012,
Figure 56).
3. Using digital multimeter
Continuity Replace rear frame wiring
(WP 0174), test for continuity
harness (WP 0295).
between connector M-C1
Proceed to Test Step 33.
(WP 0012, Figure 57) terminal 13
No Continuity Replace lower cab
and ground.
wiring harness (WP 0291).
Proceed to Test Step 33.
Test Step 9. Test for Shorted
Condenser Fans Relay.
1. Using digital multimeter
Resistance 288 Ohms to 396 Ohms
(WP 0174), measure resistance
Proceed to step 2.
between connector MA-C2
Resistance Less Than 288 Ohms
(WP 0012, Figure 130) terminal B
Proceed to Test Step 12.
and terminal C.
2. Using digital multimeter
Continuity Replace auxiliary air
(WP 0174), test for continuity
conditioning condenser fan wiring
between connector MA-C2
harness (WP 0419).
(WP 0012, Figure 130) terminal B
Proceed to Test Step 33.
and ground.
No Continuity Proceed to Test
Step 10.
0121-7
