CONE-BEARING 1P4694 - Caterpillar

Inspect the wiring and the electrical connections for these components:
Connectors
Control panel
Junction box
Sensors
Illustration 1 g00449867
Typical examples of electrical connectors
(A) Military Standard connector
(1) Plug
(2) Receptacle
(B) Deutsch HD connector
(C) Phoenix terminal strip Note: Military Standard (MS), Caterpillar Environmental (CE), and Vehicle Environmental (VE) connectors are similar in design. However, the wiring is soldered to the pins and sockets of Military Standard connectors. In CE and VE connectors, the wiring is crimped into the pins and sockets. The wiring is crimped into the pins and sockets of Deutsch HD connectors also.
Turn the mode control switch to the "OFF/RESET" position. Open the circuit breaker of the main power supply.
Inspect all of the wiring for the following conditions:
Fraying
Damaged insulation
CorrosionMake repairs, as needed.
Illustration 2 g00453241
Typical junction box
(1) Relay
(2) Terminal strips
Illustration 3 g00453242
Typical control panel
(1) Connector for a module
Check the wiring for secure connections at these points of the junction box and the control panel:
Connectors
Relays
Switches
Terminal stripsPerform a pull test for each wire. This test will ensure that the wiring is properly attached. Test each wire individually.
Pull each wire with approximately 45 N (10 lb) of force. Pull the wire firmly. If a wire is loose, repair the connection. For instructions on connecting wires, see the Service Manual, "Troubleshooting" module.
Inspect the wiring at the relays and terminal strips for these conditions:
Corrosion
Fraying
If corrosion is found, scrape large deposits. Use cotton swabs with isopropyl alcohol to clean any corrosion that remains. Investigate the source of the corrosion. Correct the condition.If damage is found, replace the part.
Remove frayed strands of wire or tin the wire.
Perform Steps 6 and 7 for the connectors of the control panel and the junction box.
Check the wiring for secure connections at these points:
Connectors
SensorsPerform a pull test for each wire. This test will ensure that the wiring is properly attached. Test each wire individually.
For wiring that is attached to a connector, hold the body of the connector with one hand. Pull each wire with approximately 45 N (10 lb) of force. Pull the wire firmly.
Before testing the wiring of the sensors, ensure that the sensors are securely installed. Then pull each wire with approximately 45 N (10 lb) of force. If a wire is loose, repair the connection. For instructions on connecting wires, see the Service Manual, "Troubleshooting" module.
Disconnect the connectors at the following locations. Inspect the connectors.
Engine sensors
Junction box
Modules of the control panel
Inspect each pin and each socket for corrosion and damage. If corrosion is found, scrape large deposits. Use cotton swabs with isopropyl alcohol to clean any corrosion that remains.Investigate the source of the corrosion. Correct the condition.If damage is found, replace the part.
Reconnect the connectors.
For Military Standard, CE, and VE connectors, ensure the following conditions:
The connection is threaded properly.
The connection is threaded completely. Very little thread or no thread is visible.
For Deutsch HD connectors, ensure the following conditions:
The index markings of the plug and the receptacle are aligned.
The connection is turned fully.
The plug and the receptacle are securely connected.
Close the circuit breaker of the main power supply.