User's Manual

Preco Electronics, Inc.

370-871-1B

COMMON INSTALLATION PROBLEMS AND TROUBLESHOOTING

Display power ON green LED is not illuminated.

• Verify that keyed DC power is applied to the sensor (+12V to red wire and ground to

black wire).

• Verify that the cable between the sensor and display is connected.

Display continuously flashes.

• Check connection between display and sensor.

• If sensor had just been connected to the service tool, cycle power to sensor after

connecting to display.

• If the system has multiple sensors, verify that ‘Y’ interconnect cable is correctly installed

with the connector with the gray molding connecting to the sensor that is farthest away

from the display.

All the display LED’s are illuminated when sensor is mounted.

• Verify the sensor is pointing outward from the vehicle in an open area with no

obstructions. This may require removing the mounting screws and lifting the sensor out

away from the rear of the vehicle. If the display LED’s are not active when moved away

from the vehicle, but are active when mounted, then either a special bracket must be

used to move the sensor away from the obstruction or a calibration must be performed.

See the service tool user manual for further details on how to perform a calibration.

Back up alarm does not operate when connected to the PreView

sensor.

• Verify that the sensor reverse input (blue wire) is connected to the vehicle’s reverse

indication.

• Verify that the sensor’s orange wire is connected to the back up alarm positive (+) input

and the white wire is connected to the back up alarm negative (-) input.

• Disconnect all other back up alarm connections to the vehicle.

Sensor is detecting the ground, indicated by a few of the display LED’s being lit.

• In an open field, either move the sensor up higher or slightly angle the sensor upward 2

to 5 degrees. The minimum recommended mounting height is 30 inches. Contact

Preco for an angle bracket if one is required.

Cable between display and sensor is too short.

• Contact Preco for an extension cable. This cable is placed between the sensor and

display cable and comes in 5’, 10’, 15’ and 25’ increments.

Detection pattern seems wider when a vehicle is detected rather than a person.

• This is normal since any vehicle presents a larger radar cross section than a person. If

desired, modify the configuration by either shortening the range or going to a narrower

pattern.