T55065 Rev. A
Page 5 of 8
Light Head
Next Pattern
Indication
Previous Pattern
Indication
Default Pattern
Indication
Solid Color (All sizes) No lights on
All lights on
All lights flash once
Split Color (All sizes)
Right side on
Left side on
All lights flash twice
Table 2 - Pattern Change Indication
Flash Pattern Syncing -
The flash patterns of multiple light heads may be synced together by simply connect
-
ing the yellow wires of all light heads to be synced. Up to 20 light heads may be synced in this fashion. All flash
patterns that share the same flash rate may be synced together. For example, any 75 FPM flash pattern may
be synced with any other 75 FPM flash pattern, etc. If this feature is not desired, the end of the yellow wire must
be sealed or capped.
Flash Pattern Dimming -
Flash patterns are dimmed when the purple wire is given a +12VDC signal. It is up to
the installer to determine how to integrate this feature into their system. If this feature is not desired, the end of
the purple wire must be sealed or capped.
Cutoff and Steady Burn Override -
The green wire supports two different features, but only one may be used
for a given light head. The green wire’s default mode is Cutoff. To toggle between the two modes, connect the
black and white wires to ground. Apply +12VDC to the red wire. The light head will flash once and remain off
until the white wire is removed from ground. This indicates that the mode has been successfully changed.
NOTE: These two features require a different signal to activate them. Cutoff is activated by a ground
signal, and Steady Burn Override is activated by a +12VDC signal.
Cutoff -
Allows a ground input signal to the green wire to cut off the whole light on solid-color 3x7, 4x6 and 7x9
light heads, or the right side of the light head on left/right spit color light heads. This is useful for NFPA vehicles
that need to cut off their white lights when blocking right-of-way. Upon removal of the ground signal, the current
flash pattern will resume.
