259D Compact Track Loader – Connector Locations

The Diagnostic Connector is located behind the fuse panel cover behind the RH side of the Operator Seat (See Illustration 1).

The Machine ECM is located behind the rear liner assembly in the cab. The rear liner assembly is located behind the Operator Seat.

Two connectors join the wiring harness to the inputs and outputs of the ECM. J1 uses 86 pins and J2 uses 80. Refer to the Testing and Adjusting, "System Schematic" section of this manual for connector contact descriptions.

In order to locate machine wiring harness connectors on the machine, the Electrical System Schematic, Parts Manual and Operation and Maintenance Manual for the machine that is being serviced should be used.

The following information is a guide to reading the tables on the back of the Electrical System Schematic.

• The "Component Location" table uses white circles or light gray circles in order to mark the locations in the profile of the machine and in the area views. Alphabetical letters in the "Machine Location" column indicate a general area of the machine. 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 or light gray circles in order 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 machine. Refer to the corresponding footnote at the end of the table for a description of the location.

Connector Contact Numbers