BRACKET AS 3788004 - Caterpillar

Machine ECM
The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the travel alarm circuit of the machine.
Table 1
Machine ECM (MID 299)    
DTC     Code Description     System Response    
376-3     Travel Alarm : Voltage Above Normal     The ECM will prevent the operator from engaging the machine in the reverse direction.    
376-5     Travel Alarm : Current Below Normal     The ECM will prevent the operator from engaging the machine in the reverse direction.    
376-6     Travel Alarm : Current Above Normal     The ECM will prevent the operator from engaging the machine in the reverse direction.    Possible causes for an FMI 3 diagnostic code are:
The travel alarm is shorted to a + battery source.
The Machine ECM has failed. A failure of the ECM is unlikely.Possible causes for an FMI 5 diagnostic code are:
The energize circuit of the travel alarm is open.
The return circuit of the travel alarm is open.
The travel alarm has failed.
The Machine ECM has failed. A failure of the ECM is unlikely.Possible causes for an FMI 6 diagnostic code are:
The travel alarm circuit is shorted to ground
The travel alarm has failed.
The Machine ECM has failed. A failure of the ECM is unlikely.
Illustration 1 g03168876
Travel Alarm CircuitNote: The diagram above is a simplified schematic of the Travel Alarm connections. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, KENR9677 (316E), Electrical Schematic, KENR9657 (312E), or Electrical Schematic, UENR3189 (318E) for the complete schematic.Diagnostic Trouble Code Procedure
Note: Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure.
Table 2
Troubleshooting Test Steps    Values    Results    
1. Identify The Active FMI Code Associated With The Solenoid Circuit    
Code present     FMI 3 diagnostic code, Proceed to Test Step 2.
FMI 5 diagnostic code, proceed to Test Step 3.
FMI 6 diagnostic code, proceed to Test Step 5.    
Begin Process For FMI 3 Troubleshooting HERE    
2. Check The Signal Circuit For A Short
A. Key start switch and disconnect switch OFF.
B. Disconnect the harness connector from the switch panel.
C. Disconnect the travel alarm from the machine harness.
D. At the C2 connector for the switch panel measure the resistance between the travel alarm pin location and all sources for +battery.    
Each reading is greater than 5K Ω.     OK - All measurements are greater than 5K Ω.
Proceed to Test Step 7.
NOT OK - Resistance is less than 5 Ω, a short exists in signal circuit.
Repair: Repair or replace machine harness.
Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or