VEE BELT 8F5164 - Caterpillar

Test Step 1. CHECK THE SWITCH INPUT CIRCUITS FOR AN OPEN
Turn the disconnect switch and the key switch to the OFF position.
At the switch, connect a jumper wire between the normally closed (N/C) contact 4 (wire J992-YL) and the normally open (N/O) contact 6 (wire J995-PU).
Disconnect the machine harness connector C16 from the Switch Panel.
At the harness connector C16, measure the resistance between N/C contact C16-12 (wire J992-YL) and N/O contact C16-11 (wire J995-PU).
While observing the multimeter resistance measurement, wiggle the machine harness connectors for the ECM. Gently pull on the wires and move the wires around.Expected Result:The resistance measurement is less than 5 ohms at all times during the manipulation of the harness and connectors.Results:
OK - The resistance measurement is less than 5 ohms. The switch input circuits are not open in the machine harness. Proceed to Test Step 2.
NOT OK - The resistance measurement is greater than 5 ohms. One of the switch circuits is open or has a poor connection in the machine harness. Repair: A resistance measurement that is greater than 5000 ohms could indicate that a wire is either not connected or is open. A measurement greater than 5 ohms but less than 5000 ohms could indicate a connection point in the circuit that is not open but is not a good connection.There is an open or a poor connection in switch input wire J992-YL or switch input wire J995-PU. Check each circuit individually in order to determine which circuit has the problem. Refer to the complete machine Electrical System Schematic. Verify that all connection points for the circuit are clean, secure and in good condition. Repair the machine harness or replace the machine harness. STOPTest Step 2. CHECK THE SWITCH GROUND CIRCUIT FOR AN OPENThe disconnect switch and the key switch remain in the OFF position. The harness connector C16 remains disconnected from the Switch Panel.
At the Generator Enable Switch, connect the jumper wire that was used in the last test step between the common ground contact 5 (wire A270-BK) and the normally closed (N/C) contact 4 (wire J992-YL).
At the ECM machine harness connector C16, measure the resistance between wire A270-BK and N/C contact C16-12 (wire J992-YL) .
While observing the multimeter resistance measurement, wiggle the machine harness connectors for the ECM. Gently pull on the wires and move the wires around.Expected Result:The resistance measurement is less than 5 ohms at all times during the manipulation of the harness and connectors.Results:
OK - The resistance measurement is less than 5 ohms. The ground common circuit is not open in the machine harness. Proceed to Test Step 3.
NOT OK - The resistance measurement is greater than 5 ohms. The ground common circuit is open or has a poor connection in the machine harness. Repair: A resistance measurement that is greater than 5000 ohms could indicate that a wire is either not connected or is open. A resistance measurement that is greater 5 ohms but less than 5000 ohms could indicate that one of the connection