Seed Hawk AIRCART 2013 - Manual (Page 70)

SEED HAWK
®
AIRCART OPERATOR’S MANUAL 65
7.4.6 TROUBLESHOOTING
1. MUX Sensor is not recognized at power up. This will include the ground speed, fan, and bin
level sensors
Possible causes: Harness wiring is faulty or the sensor is
defective.
Solution: With the system turned on, go the sensor that is not
communicating. There is a LED on each sensor (except the
multilevel bin sensor). If it is flashing slowly (1 flash every 2‐3
seconds) that indicates that power and ground are connected
but the sensor wire is not. The power wire is +12 volts and is
the white wire. It is in the “A” position on the connector. The
Ground wire is black and is in the “B” position on the
connector. The sensor wire is the green wire and is in the “C”
position on the connector. If the LED is not flashing, unplug the
sensor from the harness and plug it back in. If the LED lights
momentarily, power is present and the sensor is faulty. If the
LED does not light at all check power at the connector. You
should measure 12 volts between the white and black wire. If
you do, the sensor is faulty, if you don’t the harness is faulty. All
the white wires on the MUX harness are connected in parallel,
all the black wires are in parallel, and all the green wires are in
parallel. You can measure continuity be‐ tween any of the “A”,
“B”, or “C” connections on the MUX harness.