John Deere 87: Speed Sensor Input Voltage is Too High

The speed sensor is providing an input voltage that exceeds the acceptable range, which may affect the proper operation of the system relying on this signal.

1. 1

   Speed Sensor

2. 2

   Wiring to the Speed Sensor

3. 3

   Controller Input Circuit

1. 1

   Inspect

   Inspect the wiring and connections to the speed sensor for damage, corrosion, or loose contacts.

2. 2

   Test

   Test the voltage output of the speed sensor using a multimeter to confirm it is outside the specified range.

3. 3

   Verify

   Verify the input circuit of the controller for any abnormal voltage readings or faults.