John Deere 1492: Cab Interior Backlighting Output Transistor Fault

The Cab interior backlighting output transistor has detected an open, short, over voltage, or over temperature condition. The Cornerpost Control Unit has turned off the backlighting. The fault condition must be resolved before the backlighting can be reactivated.

1. 1

   The Cab interior backlighting output transistor

2. 2

   The wiring and connections to the Cab interior backlighting output transistor

3. 3

   The power supply to the Cab interior backlighting output transistor

4. 4

   The temperature of the Cab interior backlighting output transistor

1. 1

   Inspect

   Inspect the Cab interior backlighting output transistor for visible damage or overheating.

2. 2

   Test

   Test the Cab interior backlighting output transistor for proper operation using a multimeter.

3. 3

   Check

   Check the wiring and connections to the Cab interior backlighting output transistor for shorts, opens, or poor contact.

4. 4

   Verify

   Verify the power supply to the Cab interior backlighting output transistor is within the specified range.

5. 5

   Replace

   If the Cab interior backlighting output transistor is faulty, replace it with a compatible replacement.