2004/12/06 Caterpillar

Off-Highway Truck/Tractor:

797 (S/N: 5YW1-UP)

797B (S/N: JSM1-UP)

This procedure describes the separation of the wiring harness between the rear engine and the torque converter. This will allow independent replacement of either the wiring harness for the engine or for the torque converter.

Refer to the following steps in order to adapt the wiring harness.

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Illustration 1	g01126551
Location of the cut in the wiring harness

1. Cut the 258-4952 Harness after the breakout for the engine speed sensor.

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Illustration 2	g01126325
Pin locations on the connector

2. Assemble the connector for the portion of the wiring harness for the torque converter. Use the following parts:
   • 155-2252 Connector Plug As

   • 155-2258 Plug Lock Wedge

   • 8T-8729 Connector Pins

   Table 1 indicates the pin number that corresponds with each wire.

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   Table 1

   Pin Number	Wire Number	Description
   1	705	TC Lockup Solenoid
   2	H803	TC Lockup Solenoid
   3	A493	TC Screen Switch
   4	A491	TC Inlet Filter Switch
   5	E909	XMSN Input Speed Sensor
   6	E908	XMSN Input Speed Sensor
   7	799	TC Oil Temp Sensor
   8	481	TC Oil Temp Sensor
   9	C989	PT Oil Level Switch
   10	J765	Sensor Return
   11	N/A	Not Used
   12	N/A	Not Used

3. Assemble the connector for the engine portion of the wiring harness. Use the following parts:
   • 3E-5179 Receptacle As

   • 155-2258 Plug Lock Wedge

   • 8T-8730 Connector Sockets

   Table 1 indicates the pin number that corresponds with each wire.

4. Connect the plug to the receptacle.