The Electrical System Schematic, Parts Manual, and Operation and Maintenance Manual for the machine that is being serviced should be used to locate electrical components and connectors.
The following information is a guide to reading the tables on the Electrical System Schematic.
- The "Component Location" table uses white circles to mark the locations in the profile of the vehicle and in the area views. Alphabetical letters in the "Machine Location" column indicate a general area of the vehicle. Refer to the corresponding footnote at the end of the table for a description of the location.
- The "Harness Connector Location" table uses white circles to mark the locations in the general view and in the area views. Alphabetical letters in the "Machine Location" column indicate a general area of the vehicle. Refer to the corresponding footnote at the end of the table for a description of the location.
Connector Contact Numbers
 | |
| Illustration 1 | g01255959 |
Electronic Control Module (ECM) | |
 | |
| Illustration 2 | g01255962 |
Harness Connectors J1 and J2 that mate to the ECM | |
70 Terminal Connector
The 70-pin connectors are used to route power and certain dedicated inputs to the ECM. Crimping and wire specifications for this connector are similar to the 70 terminal connector. The figures below show pin and socket locations for the 70-pin connector.
 | |
| Illustration 3 | g01260645 |
70-pin Plug Connector | |
Service Tool Connectors
 | |
| Illustration 4 | g03719920 |
14-pin Connector (A) - Battery (B) + Battery Unswitched (C) CAN (250 ) + (D) CAN (250 ) - (E) CAN Shield (F) ATA + (G) ATA - (H) CDL+ (J) CDL - (K) Reserved (L) Ethernet Rx - (M) Ethernet Rx + (N) Ethernet Tx - (P) Ethernet Tx + | |