Bully Dog 4038x Sensor Docking Station - Manual (Page 28)

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Sensor Docking Station
Analog Sensor Wiring
There are two openings on each analog sensor docking port.
The AN+ dock supports a 0-5 volt signal wire from the sensor.
The AN- dock is an optional ground connection; however, it
is recommended that you use the chassis ground if a sensor
requires a ground connection. (This should be the same
chassis ground used for the power harness.)
The diagram below illustrates the wiring configuration for a
three-wire analog sensor.
1. Power in to the sensor. Key-on power only (5-12 volts).
2. Signal out from the sensor (0-5 volts).
3. Ground connection. (This must be connected to the same ground
location as the Sensor Docking Station chassis ground wire.)