RACE 3B8924 - Caterpillar

to the replacement of a module, ensure that the replacement is absolutely necessary. A module is seldom the cause of a problem. Always check that the harness code is correct for the Main Display Module and that power is available to the Main Display Module. For information about a Harness Code, see Systems Operation, "Quad Gauge Module".
Turn the "ECS" switch to the OFF/RESET position. Disconnect the engine harness from the Main Display Module.
Make sure that the Replacement Module has the correct part number.
Remove the old module and install the Replacement Module.Note: If the Replacement Module was previously removed from service, see Testing And Adjusting, "Main Display Module Initialization - Adjust".
Connect the engine harness to the Replacement Module.
Turn the "ECS" switch to the COOLDOWN/STOP position. Make sure that the Replacement Module and the Quad Gauge Electronic Modules successfully complete the Self Test. For more information on this subject, see Testing And Adjusting, "System Self Test".
Set the display to English units or Metric units. See Systems Operation, "Units Mode" for more information.