TM 5-3805-296-23-2
0073
Table 1. 1278 Apron Lower Proportional Solenoid Diagnostic Codes Continued.
073
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 5. Test Main Cab Wiring
1278-05 Apron Lower
Harness for High Resistance or
Solenoid Current Below
Open.
Normal Continued
1. Remove jumper wire from
terminal 8 and terminal 10 of
connector connector E-C2
(WP 0012, Figure 143).
2. Connect jumper wire between
terminal 8 and terminal 10
of connector W-C3
(WP 0012, Figure 139).
3. Disconnect connector W-C13
(WP 0012, Figure 89) from
transmission/chassis ECM.
4. Using digital multimeter
Resistance 5.0 Ohms or Less
(WP 0540), measure resistance
Replace transmission/chassis ECM
between connector W-C13
(WP 0495).
terminal 12 and terminal 3
Proceed to Test Step 6.
(WP 0012, Figure 89).
Resistance Greater Than 5.0 Ohms
Replace main cab wiring harness
(WP 0505).
Proceed to Test Step 6.
0073-12
