TURBOCHARGER GP 2867850 - Caterpillar

3. Make sure there is continuity from the pressure switch to vehicle ground. Then connect the 432-PK wire to the switch again.Disconnect the harness connector from the operator panel. Check for continuity between sockets 2 and 8. (Socket 2 is the ground for the operator panel; socket 8 goes to the brake oil pressure switch.) Coolant Flow Indicator
Loss of engine coolant flow can cause much damage to the engine. If the coolant flow indicator FLASHES, STOP THE VEHICLE AND STOP THE ENGINE IMMEDIATELY.With the engine stopped (no coolant flow), the coolant flow switch must be open.1. Remove the BK wire (that connects to the 412-BU wire) from the coolant flow switch and put it to vehicle ground. 2. Connect the BK wire, removed from the switch in Step 1, to vehicle ground. Disconnect the harness connector from the operator panel.Check for continuity between sockets 2 and 12. (Socket 2 is the ground for the operator panel; socket 12 goes to the coolant flow switch.) 3. Remove the coolant flow switch. Make sure both wires are connected to the switch.Push the lever on the flow switch.The indicator must turn OFF. Transmission Oil Filter
The transmission oil filter circuit has two switches:There is a switch that feels the pressure across the filter. This switch opens if there is too much increase in pressure through the filter.There is a temperature switch that measures the temperature of the oil. This switch opens when the oil is at the normal temperature of operation.Both switches must be open to activate the transmission oil filter indicator. If the indicator flashes when the engine is first started in cold conditions, and then does not flash when the engine is hot, this is an indication that the temperature switch is bad. It does not close to make the circuit not activate while the oil is thick. This condition can also be caused by a broken wire (either the 426-BR or 201-BK) between the pressure switch and the temperature switch.1. Let the engine run until it is at the normal temperature of operation. Remove the 426-BR wire from the oil filter pressure switch and put it to vehicle ground. 2. Check for continuity across the switch. 3. Make sure there is continuity through the pressure switch to vehicle ground. Then connect the 426-BR wire to the switch again.Disconnect the harness connector from the operator panel.Check for continuity between sockets 2 and 17. (Socket 2 is the ground for the operator panel; socket 17 goes to the oil filter switch.) Hydraulic Temperature, Engine Coolant Temperature, Or Transmission Oil Temperature Indicator
Follow the instructions given at the first of the section on the EMS operator panel, to make sure a system is cool enough for the indicator to be OFF. If the indicator does NOT turn OFF, make a check of the electrical system as follows:1. Disconnect the control wire from the temperature switch of the indicator that is ON (FLASHES). (See TABLE 4). Check for continuity through the switch. 2. Check