ALTERNATOR GP-CHARGING 1128032 - Caterpillar

Illustration 1 g01032933
(1) Armrest indicator (2) Parking brake indicator
Occupy the seat.
Place the armrest in the DOWN position.
Turn the key start switch to the ON position.Expected Result:The armrest indicator should be off and the parking brake indicator should be on.Results:
OK - The armrest indicator is off and the parking brake indicator is on. Proceed to Test Step 9.
NOT OK - The armrest indicator is flashing and the parking brake indicator is flashing. Proceed to Test Step 2.
NOT OK - The parking brake indicator is flashing.Repair: See Troubleshooting, "Parking Brake Indicator Is Flashing". Stop.
NOT OK - The armrest indicator is flashing.Repair: See Troubleshooting, "Armrest Indicator Is Flashing". Stop.Test Step 2. CHECK THE RETURN SOLENOID WIRE FOR A SHORT TO GROUND
Turn the key start switch to the OFF position.
Raise the cab. See Operation and Maintenance Manual, "Cab Tilting".
Locate the interlock ECM. The interlock ECM is located on the left side of the machine beneath the access cover on the floor of the machine.
Remove the wire harness from the ECM.
Measure the resistance from contact 3 to contact 68 (wire 201-BK and wire 975-WH) of the wire harness connector.Expected Result:The resistance should be greater than 5000 Ohms.Results:
OK - The resistance is greater than 5000 Ohms. Proceed to Test Step 6.
NOT OK - The resistance is not greater than 5000 Ohms. Proceed to Test Step 3.Test Step 3. CHECK THE HYDROSTATIC PILOT SOLENOID FOR A SHORT TO GROUND
Locate the hydrostatic pilot solenoid.
Disconnect the wire harness from the hydrostatic pilot solenoid.
Measure the resistance from contact 3 to contact 68 (wire 201-BK and wire 975-WH) of the wire harness for the ECM.Expected Result:The resistance should be greater than 5000 Ohms.Results:
OK - The resistance is greater than 5000 Ohms.Repair: The hydrostatic pilot solenoid has failed. Replace the coil for the hydrostatic pilot solenoid. Stop.
NOT OK - The resistance is not greater than 5000 Ohms. Proceed to Test Step 4.Test Step 4. CHECK THE WORK TOOL PILOT SOLENOID FOR A SHORT TO GROUND
Locate the work tool pilot solenoid.
Disconnect the wire harness from the work tool pilot solenoid.
Measure the resistance from contact 3 to contact 68 (wire 201-BK and wire 975-WH) of the wire harness for the ECM.Expected Result:The resistance should be greater than 5000 Ohms.Results:
OK - The resistance is greater than 5000 Ohms.Repair: The work tool pilot solenoid has failed. Replace the coil