HOSE 2L5638 - Caterpillar

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RFM J1 connector harness (brown)
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RFM J2 connector harness (black)
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Sensor connector (sensor side)
Test Step 1: Check for Power At the Boom Angle Sensor
Do not disconnect the harness connector from the boom angle sensor.
Turn the key start switch and the electrical master switch to the ON position.
Connect an analyzer to the machine, navigate to the system voltage menu and record system voltage.Typical system voltage is 11.0-12.0VDC without the engine running depending on the state of battery charge. The boom angle sensor will not operate if the supplied voltage is below 10VDC. Therefore, system voltage must be 10.0VDC or greater for the boom angle sensor to properly function.
At the back of the harness connector for the sensor, insert the 7X-1710 Multimeter Probe or an equivalent, along the voltage supply wire terminal contact 2 and 7X-1710 Multimeter Probe to the negative wire terminal contact 1 and record the measured voltage.Expected Result:Measured voltage = Recorded system voltageResults:
OK - Measure voltage = Recorded system voltage minus 0.4VDC
NOT OK - Measured voltage = 0VDC - 9.9VDC Harness issue suspectedIf measured voltage is between 10.0VDC and recorded system voltage minus 0.4VDC, the sensor should function properly, but a harness issue is still suspected when either code 2344 or 2345 is still present. This condition should be investigated as if the voltage is less than 10VDC.Proceed to "Test Step 2: Check the Wiring Harness of the Sensor for an Open Circuit".Test Step 2: Check the Wiring Harness of the Sensor for an Open Circuit
The key start switch and the electrical master switch remain in the OFF position.
If voltage was 0VDC, check if Fuse F7 on the Frame Power Distribution Board is OK. If NOT OK, replace with a 15 Amp fuse. Also check if Fuse F4 on the Frame Power Distribution Board is OK. If NOT OK, replace with an 80 Amp fuse.If a fuse was blown and had to be replaced, repeat Test Step "Test Step 1: Check for Power At the Boom Angle Sensor". If both fuses are OK, proceed to step 3.
Disconnect the harness from the boom angle sensor by removing SN1609 connector (for TL642D/TL943D) or SN341 (for TL1055D/101255D).
Disconnect the connectors J1 & J2 from the Rear Frame Module (RFM) and J7 from the Power Distribution Module (PDM).
Measure the resistance between the following:
SN1609-1 (or SN341-1) and RFM J2-K3
SN1609-2 (or SN341-2) and PDM J7-4
SN1609-3 (or SN341-3) and RFM J1-A1Expected Result: The resistance measurement is less than 10 ohms for each segment.Results:
OK - The resistance measurement is less than 10 ohms. The circuit wiring is correct. Proceed to Test Step "Test Step 3: Check the Wiring Harness for a Sensor Wire Short".
NOT OK - If the resistance in any wire segment is greater than 10 ohms there is an unacceptable voltage drop in the wiring harness for that segment.Repair: Repair or replace the machine harness. STOP.Test Step 3: Check the Wiring Harness for a Sensor Wire Short
The key start switch and the electrical master switch remain in the OFF position.
All the