User manual
  Digital BUS-WATCH
®
 HDx00 
Page 24 of 85 
Radio Engineering Industries, Inc. 
640430 -- Rev 0 -- 1/12/2012 
External Record Indicator / Event Mark Button Harness 
VIEW
REAR
BUS-WATCH DVR, HD800
710331
NETJ1939INPUTSPOWER
2
1 3
4
AUX
PANIC
ACC GPS USB
75
6
8
CAMERAS
ANT1
ANT2
ALARM/PANIC CABLE
511986 - 20 FT.
512023 - 40 FT.
512025 - 40 FT.
512024 - 20 FT.
AFTERMARKET
OEM
PANIC
Figure 12: External Record Indicator / Event Mark Button Harness Connection 
The  optional  Digital  BUS-WATCH®  external  record  indicator  /  event  mark 
button harnesses come in 2 different types of switches, both in 2 different lengths. The 2 
types of switches are OEM and aftermarket. The OEM switch is rectangular and fits into 
a  standard  size  dashboard  knockout.  The  aftermarket  switch  is  round,  for  easier 
installation in vehicles without spare switch knockouts.  All of the cables plug into the 
same port on the back of the DVR. 










