CAP-TRUNNION 9L0875 - Caterpillar

Indicator Lamp Is Always Flashing
This procedure is for the parameter that has the indicator lamp that flashes all of the time. The "Always Flashing" condition is probably caused by an undesired open circuit. Also, the Main Display Module may cause this problem (unlikely condition).
Locate The Switch.
Turn the "ECS" switch to the OFF/RESET position.
Locate the switch that corresponds to the parameter that is always flashing the indicator lamp. If necessary, use the Electrical System Schematic in order to assist in locating the switch.
Check for loose terminal connections or corroded terminal connections to the switch.
Clean corroded terminals and tighten loose connections.
Check The Harness.
Disconnect the signal wire from the switch.
Connect a jumper wire from the signal wire to the ground wire. If a ground wire is not near, connect the signal wire to the battery ground.
Turn the "ECS" switch to the COOLDOWN/STOP position.Expected Result: The indicator lamp should stop flashing.Results:
Not OK: The indicator lamp continues to flash. The engine harness is open or the Main Display Module has a problem. Proceed to Step 3.
OK: The indicator lamp stops flashing. The circuit is operating correctly. The switch has a problem. Check the switch or replace the switch.
Check The Harness.
Turn the "ECS" switch to the OFF/RESET position.
On the Electrical Schematic, trace the signal wire from the switch to the Main Display Module.
Determine the signal connector contact number that is located on the Main Display Module.
At the engine harness connector for the Main Display Module, measure the resistance that is between the signal contact and Contact 2 (ground).Note: The jumper wire from Step 2 is still connected.Expected Result: The resistance should be less than 5.0 ohms.Results:
Not OK: The resistance is greater than 5.0 ohms. The engine harness has a problem. Repair the engine harness or replace the engine harness.
OK: The resistance is less than 5.0 ohms. The harness resistance is correct. The Main Display Module has a problem. Replace the Main Display Module. For more information, see Testing And Adjusting, "Module - Replace".Indicator Lamp Never Flashes
This procedure is for the parameter that occurs when the indicator lamp never flashes. The "Never Flashes" condition is probably caused by a short to ground. Also, this condition may occur because of a problem with the Main Display Module (unlikely condition).
Locate The Switch.
Turn the "ECS" switch to the OFF/RESET position.
Locate the switch that corresponds to the parameter that never flashes the alert indicator. If necessary, use the Electrical System Schematic to assist in locating the switch.
Check for loose terminal connections or corroded terminal connections to the switch.
Clean the corroded terminals and tighten the loose connections.
Check The Harness.
Disconnect the signal wire from the switch.
Turn the ECS switch to the "COOLDOWN/STOP" position.Expected Result: The Alert Indicator should flash.Results:
OK: The Alert Indicator flashes. The circuit is operating correctly. The switch has a problem. Check the switch or replace the switch.
Not OK: The Alert Indicator does NOT flash. The engine harness is open or the Main Display Module has a problem. Proceed to Step 3.
Check The Harness.
Turn the "ECS" switch to the