Use Sensor Tester (MEL1428) and seat bar sensor tester adapter (MEL1567) for the following procedure:
Connect the seat bar adapter sensor leads (MEL1567) to the sensor tester.
Disconnect the seat bar sensor connector (Item 1) [Figure 60-110-1].
Connect the Sensor Tester (Item 1) [Figure 60-110-2] inline, to the seat bar sensor connectors. See inset [Figure 60-110-2].
Turn the key to the ON position. DO NOT START THE ENGINE.
The toggle switch (Item 2) [Figure 60-110-3] can be in either the Absent or Present position.
If there is no power light (Item 1) [Figure 60-110-3] on the sensor tester, check the tester or wiring harness.
Lower the seat bar. The Sensor Test light (Item 1) [Figure 60-110-4] should illuminate.
Raise the seat bar. The Sensor Test light (Item 1) [Figure 60-110-4] should go off.
If the above test fails, there is a problem with the seat bar sensor.
Disconnect the Sensor Tester.
Replace the Seat Bar Sensor. (See Removal And Installation on Page 60-110-3.)
If the above test passes, run the seat bar sensor BICS circuit test. (See Bobcat Interlock Control System (BICS) Circuit Test on Page 60-110-5.)