Caterpillar — 99709-68120

PRECAUTIONS FOR MAINTENANCE OPERATION Connector pin fall out inspection Damaged connector pin stoppers can cause poor engagement of the terminals (male and female pins) even if the connector body is secured, and might cause some pins to fall out. Check if the pins have fallen out from the connector by pulling each harness gently. 02594 Inspection Procedures for Blown Fuses Remove fuse B and measure resistance between the loaded side of the fuse and ground. Turn on all circuit switches (connected to the fuse). If the resistance value reading is approximately 0, a short has occurred between the switch and the loaded point.

A value of other than zero may indicate that the fuse was blown by a temporary short but the short is no longer present. The major causes of a short circuit are as follows: Harness stuck onto the vehicle body. Harness sheath damaged by friction or heat. Water in connectors or circuits. Mistakes (accidental short circuits) A : Battery B : Fuse C : Loaded switch D : Load E : Short circuit 02596 Precautions for Handling Alternator When servicing the alternator, pay attention to the following: Do not connect the alternator with battery polarities reversed.

If the alternator is connected with reversed polarities, a large current flow from the battery to the alternator occurs, and the diode or regulator might be damaged. 04746 00-10