TM 5-3805-296-23-1
0054
Table 1. 0144 Backup Alarm Diagnostic Code Continued.
054
CID FMI
TEST OR INSPECTION
CORRECTIVE ACTION
5. Using digital multimeter
0144-03 Backup Alarm Relay
Continuity Replace main cab wiring
(WP 0540), test for continuity
Voltage Above Normal
harness (WP 0505).
between connector W-C13
Continued
Proceed to Test Step 4.
terminal 16 (WP 0012, Figure 89)
No Continuity Replace transmission/
and all terminals in connector
chassis ECM (WP 0495).
W-C12 (WP 0012, Figure 88).
Proceed to Test Step 4.
Test Step 4. Verify Malfunction is
Resolved.
1. Ensure all harness connectors are
connected.
2. Ensure backup alarm relay and
flood enable relay are installed on
fuse panel.
3. Turn battery disconnect switch and
ignition switch to ON position
(TM 5-3805-296-10).
4. At MSD, check for active
144-3 Backup Alarm Relay Voltage
diagnostic codes (WP 0008).
Above Normal Becomes Inactive
Troubleshooting complete.
144-3 Backup Alarm Relay Voltage
Above Normal Remains Active
Repeat troubleshooting from the
beginning.
NOTE
0144-05 Backup Alarm
Backup Alarm Relay Current
Always inspect harness connectors that are involved in the circuit. Poor
Below Normal
connections can often be the cause of a problem in an electrical circuit.
Verify that all connections in the circuit are clean and secure and that all
connections are in good condition. If a problem with the connection is
found, correct the problem and verify that this malfunction or diagnostic
code is active before performing this procedure.
Perform open or short-circuit test at each harness connection to identify
the correct harness to replace.
Tag all wiring harnesses to aid in installation.
Perform this test only if condition is active.
DIAGNOSTIC CODE SET CONDITION
Transmission/Chassis ECM Detects Abnormally Low Current on Backup Alarm
Relay Circuit X796.
POSSIBLE CAUSE
Backup Alarm Relay.
Fuse Panel Wiring Harness High Resistance or Open.
Main Cab Wiring Harness High Resistance or Open.
Transmission/Chassis ECM.