Preco Electronics, Inc.
415 N. Maple Grove, Boise, ID 83704 (800) 453-1141
Copyright 2003
Page 7 of 10
370-894-1B
should be taken to not route the cable next to heat sources such as the engine and exhausts
and areas that may see abrasion or rock damage.
Initial System Power Up and Test
Once the sensor and display are installed, wired, and connected, power should be applied to
test correct system operation. Upon power up, the display will go through its self-test by
illuminating all LED’s and sounding the buzzer. When the system is operating correctly in an
open field with no obstructions, the green power LED will be the only light illuminated. If all the
detection (yellow) LED’s are lit, check for any obstruction which may be detected by the
sensor. If possible move the sensor so it is not detecting the object(s). If it is not possible to
relocate the sensor, then consult the factory.
If for some reason the system is malfunctioning, all of the LED’s (yellow and green) will be
flashing and the buzzer will be sounding. Refer to the Error Indications and Troubleshooting
sections below to determine the error and solution.
Once the system has been installed, the detection zone should be tested. Testing is
accomplished by using two individuals. One individual engages the parking brake, depresses
the vehicle brake, and places the vehicle in reverse. The other individual then walks through
the detection zone noting where the display buzzer or the back up alarm activates. By moving
about the rear of the vehicle and noting when the display or back up alarm activate, an
accurate detection zone can be mapped.
