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Preco Electronics, Inc.

      415 N. Maple Grove, Boise, ID 83704       (800) 453-1141  

Copyright 2003 

Page 6 of 10 

  370-894-1B 
 

Back Up Alarm Electrical Connection 

The PreView

 tm

 sensor provides a normally open relay contact that can be used to activate an 

external back up alarm.  The PreView

 tm

 system activates this relay output whenever an object 

is detected.  Connect the orange and white wires on the sensor harness as shown below if a 
back up alarm is desired.  

 

N

N

O

O

T

T

E

E

:

:

 

 

The PreView

 tm

 sensor does not provide power for back up alarm use. 

 

Display Unit Installation 

The display unit should be mounted where the vehicle operator can easily view it while 
backing.  The ideal location for this is on the dash positioned by either windshield pillar.  This 
will allow the operator view of the display while also looking out one of the side mirrors. 
 
The display unit harness should be taken into consideration when selecting a mounting 
location for the display.  Since the connection between the display and sensor harness is not 
watertight, it should be routed in such a manner so it is not exposed to the outside 
environment. 
 
The PreView

 tm

 display unit comes equipped with a mounting bracket and hardware.  If 

desired, the display unit can be mounted to the display bracket with the supplied hardware.  
This bracket can then be mounted in the vehicle cab as desired.  
 

Cable Installation 

The interconnect cable between the sensor and display is 25 feet (7.6M) in length. If the 
distance between the sensor and display is greater than 25 feet, contact Preco for additional 
cable extensions.  Cables come in 5, 10, 15, and 25 lengths. 
 
Routing of the cable should start at the sensor since the display end comes equipped with a 
grommet to allow sealing the entry point into the cab.  Allow for a small service loop in the 
cable at the sensor and secure the cable every few feet (~1M) with tie wraps.  When ready to 
enter the cab, drill a 9/16” (14mm) hole and feed the display connector through.  Once the 
connector is through, the grommet can then be pulled into the hole until snug.  The remaining 
length of cable is then routed to the display unit and the connectors are latched together. Care 

+12 VDC

PreView (Orange Wire)

PreView (White Wire)

Ground

+

-

Summary of Contents for Standard PreView

Page 1: ...major components an environmentally sealed sensor an operator display mounted in the cab of the vehicle and a recommended external back up warning alarm The Standard PreView tm system does not require...

Page 2: ...e an audible alert that will increase in rate as an object becomes closer providing the operator with another cue that an object is being detected The operator display continuously monitors communicat...

Page 3: ...r object usually reflects more energy than a smaller object Distance the farther away an object is the less energy is returned Composition a metal object reflects more energy than a non metallic objec...

Page 4: ...ure All units 40o F to 185o F 40o C to 85o C ELECTRICAL SPECIFICATIONS Input Voltage 9 33 volts DC Input current 0 25 amp maximum Polarity Polarity protected Power Connection Two 18 AWG wires Relay Ou...

Page 5: ...Select a location that will provide some protection from impact and debris while allowing an unobstructed view of the target hazard area I Im mp po or rt ta an nt t Before the PreView tm system is per...

Page 6: ...is not watertight it should be routed in such a manner so it is not exposed to the outside environment The PreView tm display unit comes equipped with a mounting bracket and hardware If desired the d...

Page 7: ...bstruction 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...

Page 8: ...from the vehicle reposition the sensor to a new location that offers and unobstructed view Back up alarm does not operate when connected to the PreView tm sensor Verify that the back up alarm positive...

Page 9: ...RANTIES FOR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY EXCLUDED AND SHALL NOT APPLY TO THE PRODUCT BUYER S SOLE AND EXCLUSIVE REMEDY IN CONTRACT TORT OR UNDER ANY OTHER THEORY AGA...

Page 10: ...erformed with two people one who remains in the cab the operator and one who walks through the sensor field to the rear of the vehicle the assistant 1 Clean the black sensor surface of any accumulatio...

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