BUSHING 5079330 - Caterpillar

Open Circuit Test
Table 1
Troubleshooting Steps    Values    Results    
1. Identify Open Circuit
A. Identify the connectors and wires in the suspect circuits.
Use the machine Electrical Schematic.
B. Turn off the keyswitch and the disconnect switch.
C. Disconnect the component and the ECM from the harness.
D. At one of the disconnected harness connections, place a jumper wire from the suspect wire contact to frame ground.
E. At the other connector of the harness, measure the resistance from the suspect wire contact to frame ground (1).    
< 5 Ω    
OK - The resistance is < 5 Ω.
The circuit is not open.
STOP
Not OK - The resistance is ≥ 5K Ω.
The circuit is open (2).
Repair:
Repair or replace the harness.
STOP    
( 1 ) Use a calibrated digital multimeter for this check.
( 2 ) A resistance ≥ 5 Ω but < 5K Ω, indicates a loose or corroded connection. A resistance ≥ 5K Ω indicates an open.