TM 5-3805-296-23-2
0072
Table 1. 1277 Apron Raise Proportional Solenoid Diagnostic Codes Continued.
072
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
3. Disconnect connector E-C1
1277-03 Apron Raise
(WP 0012, Figure 140)
Solenoid Voltage Above
from connector W-C3
Normal Continued
(WP 0012, Figure 139).
4. Using digital multimeter
Continuity Replace hitch wiring
(WP 0540), test for continuity
harness (WP 0401).
between connector E-C2
Proceed to Test Step 5.
terminal 9 (WP 0012, Figure 143)
No Continuity Proceed to Test
and all other terminals
Step 4.
in connector E-C2
(WP 0012, Figure 143).
Test Step 4. Test for Shorted Main
Cab Wiring Harness.
1. Disconnect connector W-C13
(WP 0012, Figure 89) from
transmission/chassis ECM.
2. Disconnect connector W-C12
(WP 0012, Figure 88) from
transmission/chassis ECM.
3. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C3
Proceed to Test Step 5.
terminal 9 (WP 0012, Figure 139)
No Continuity Proceed to step 4.
and all other terminals
in connector W-C3
(WP 0012, Figure 139).
4. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C13
Proceed to Test Step 5.
terminal 4 (WP 0012, Figure 89)
No Continuity Proceed to step 5.
and all other terminals
in connector W-C13
(WP 0012, Figure 89).
5. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C13
Proceed to Test Step 5.
terminal 4 (WP 0012, Figure 89)
No Continuity Replace transmission/
and all terminals in connector W-
chassis ECM (WP 0495).
C12 (WP 0012, Figure 88).
Proceed to Test Step 5.
Test Step 5. Verify Malfunction is
Resolved.
1. Ensure all harness connectors are
connected.
2. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
0072-5