SHAFT-DRIVEN 3412834 - Caterpillar

Guidelines
Use a 1U-5804 Crimp Tool (12-GA TO 18-GA) to service Deutsch HD and DT connectors. Never solder the terminals onto the wires. See Tool Operating Manual, SEHS9615, "Servicing Deutsch HD and DT Style Connectors".
Use a 147-6456 Wedge Removal Tool to remove wedges from DT connectors. Never use a screwdriver to pry a wedge from a connector.
Use a breakout harness for a voltmeter probe or a test light. Never break the insulation of a wire to access to a circuit for measurements.
If a wire is cut, always install a new terminal for the repair.Tests
Check Connectors for Moisture and Corrosion
Illustration 1 g01960167
(1) Former seal design
(2) Current seal design
Illustration 2 g06220529
(3) Seal for a three-pin connector (typical example)The plug end of the DT connector has a seal at the mating end of the connector. This replaceable seal has been improved on black connectors to help prevent slipping. This improvement will help keep moisture and dirt from entering the connector.The current seal design (2) is not interchangeable with the former design (1). The receptacle has also changed to the new colors.
Inspect all wiring harnesses. Ensure that the routing of the wiring harness allows the wires to enter the face of each connector at a perpendicular angle. Otherwise, the wire will deform the seal bore. This deformation will create a path for the entrance of moisture. Verify that the seals for the wires are sealing correctly.
Disconnect the suspect connector and inspect the connector seal. Ensure that the seals are in good condition. If necessary, replace the connector.
Thoroughly inspect the connectors for evidence of moisture entry.Some minor seal abrasion on connector seals is normal. Minor seal abrasion will not allow the entry of moisture. If moisture or corrosion is evident in the connector, the source of the moisture entry must be corrected. If the source of the moisture entry is not repaired, the problem will recur. Simply drying the connector will not fix the problem. Check the following items for the possible moisture entry path:
Missing seals
Improperly installed seals
Nicks in exposed insulation
Improperly mated connectorsMoisture can also travel to a connector through the inside of a wire. If moisture is found in a connector, thoroughly check the connector harness for damage. Also check other connectors that share the harness for moisture.
Repair or replace any bad connector. Correct any moisture problems.Check the Wire Insulation for Damage
Carefully inspect each wire for signs of abrasion, of nicks, and of cuts. Inspect the wires for the following conditions:
Exposed insulation
Rubbing of a wire against the chassis
Rubbing of a wire against a sharp point
Check all of the wiring harness fasteners to verify that the harness is properly secured. Check all of the fasteners to verify that the harness is not compressed. Pull back the harness sleeves to check for a flattened portion of wire. A fastener that has been overtightened will flatten the harness. This damages the wires that are inside the harness.
Repair or replace any wire with insulation damage.Inspect the Connector Terminals
Visually inspect each terminal in the connector.
Verify that the terminals