TM 5-3805-296-23-2
0091
Table 1. 1840 Tractor Parking Brake Pressure Switch Diagnostic Codes Continued.
091
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
5. Using digital multimeter
1840-04 Tractor Parking
Continuity Replace main cab wiring
(WP 0540), test for continuity
Brake Pressure Switch
harness (WP 0505).
between connector W-C12
Voltage Below Normal
Proceed to Test Step 5.
terminal 45 (WP 0012, Figure 88)
Continued
No Continuity Proceed to step 6.
and all terminals in connector
W-C13 (WP 0012, Figure 89).
6. Using digital multimeter
Continuity Replace main cab wiring
(WP 0540), test for continuity
harness (WP 0505).
between connector W-C12
Proceed to Test Step 5.
terminal 45 (WP 0012, Figure 88)
No Continuity Replace transmission/
and ground.
chassis ECM (WP 0495).
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).
3. At MSD, check for active
1840-4 Tractor Parking Brake
diagnostic codes (WP 0008).
Pressure Switch Voltage Below
Normal Becomes Inactive
Troubleshooting complete.
1840-4 Tractor Parking Brake
Pressure Switch Voltage Below
Normal Remains Active Repeat
troubleshooting from the beginning.
END OF WORK PACKAGE
0091-10
