DVM-250/DVM-250Plus Installation Guide 860-00129-00 Rev C
Copyright © 2010-2015 Digital Ally, Inc. 1-1
Section - 1: Before you Begin
This document covers the installation of the DVM-250 or DVM-250Plus systems only, including the
Interface Box (if required) and the cabling.
Tools Needed
#2 Phillips head screwdriver
#20 Torx screwdriver or bit
1/8" (4 mm) flat-blade screwdriver
Digital Volt Meter
Cautions and Notes
Please read and follow the instructions and precautions in this installation guide when installing DVM-
250 /DVM-250Plus products.
For assistance, a qualified installation technician or mechanic should be consulted.
Do not use excessive force when removing the mirror from the windshield. The mirror mounting
plate may become separated from the windshield and/or the windshield may break if excessive
force is used. If you are unfamiliar with rearview mirror removal seek professional assistance.
Do not route wiring and cabling over sharp metal edges where they may become damaged or cut.
To prevent electrical shorts or breakage in the wiring and cabling, do not allow wiring and cabling to
be pinched behind trim pieces, panels, or other physical objects.
Do not run wires or cables in areas where they may become damaged by heat from the engine or
the exhaust system.
Do not install any DVM components or wiring in the deployment path of the air bag(s).
When installing the cables or making wire connections, it is recommended you leave a little ‘slack’
in the cable connections to allow for service loops and for movement of the mirror so the
connections do not get pulled or accidentally disconnected.
Where possible, avoid running cables parallel to other wiring and/or antenna coax that may be
installed in the vehicle.
Where possible, do not leave excessive cable above the headliner.
We recommend at least 2 feet of distance between our cabling and that of other systems which
may carry a signal for transmit and/or receive.
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