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FASTENER GP 4645035 - Caterpillar



4645035 FASTENER GP Caterpillar parts FASTENER
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Alternative (cross code) number:
CA4645035
464-5035
4645035
Caterpillar 4645035 FASTENER GP

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Illustration 1 g01322198
Schematic for the Winch Free Spool SwitchThe Winch Free Spool Switch has two inputs to the ECM. The two inputs are normally open and normally closed. During normal operation, one of the inputs is open. The other input is grounded. When a circuit is measured with a voltmeter, an open circuit will measure approximately 13 DCV to ground and a closed circuit will measure approximately 0 DCV to ground. An FMI 03 diagnostic code is recorded when the status of both the inputs are open.The possible causes of this diagnostic code are listed below:
The return circuit (wire 202-BK) is open.
Switch contact "1" signal circuit (wire P783-WH) is permanently open.
Switch contact "3" signal circuit (wire P784-OR) is permanently open.
The switch has failed.
The ECM has failed. This is unlikely. Before performing this procedure, inspect the harness connectors that are involved in the 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 this diagnostic code is active before performing this procedure.
Table 1
Status of the Switch    
MODE    Switch Position    J2-37 (N/O)
P784-OR Circuit    J2-36 (N/C)
P783-WH Circuit    
Released     Up     Open     Closed    
Pressed     Down     Closed     Open    System Response:A level 1 warning will be generated.Note: Ensure that the diagnostic code CID 2438 - FMI 03 is active before performing this procedure.Test Step 1. CHECK THE GROUND CIRCUIT FOR AN OPEN
Turn the disconnect switch and the key switch to the OFF position.
Disconnect the machine harness connectors from the ECM.
Disconnect the switch from the machine harness.
Measure the resistance between chassis ground and contact 2 (wire 202-BK) at the connector for the switch.Expected Result:The resistance should be less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. Proceed to Test Step 2.
NOT OK - The resistance is greater than 5 ohms.Repair: The return circuit (wire 202-BK) is open in the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE SWITCH
Check for continuity between contact 1 and contact 2 of the switch.
Press the switch and then release the switch while checking for continuity.
Check for continuity between contact 2 and contact 3 of the switch.
Press the switch and then release the switch while checking for continuity.Expected Result:The continuity check agrees with the preceding Table.Results:
OK - The continuity check agrees with the preceding Table. Proceed to Test Step 3.
NOT OK - The continuity check does not agree with the preceding Table. The switch has failed.Repair: Replace switch. Verify that the new switch corrects the diagnostic code.STOPTest Step 3. CHECK THE SIGNAL CIRCUITS FOR AN OPEN
Reconnect the switch to the machine harness.
The machine harness connectors remain disconnected from the ECM.
At the machine harness connector for the ECM, check for continuity between contact J2-37 (wire P784-OR) and frame ground.
Press the switch and then release the switch while


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