User's Manual

14 Installation
4. Cut the 3M™ Opticom™ GPS Priority Control
System cable to the proper length.
5. Remove about 3 inches of the outer jacket from
the end of the cable. Be careful not to cut the
wires inside.
6. Strip 1/4 inch of insulation from each wire.
NOTE: It is very important not to strip too
much insulation, which may lead to short
circuits; or too little insulation, which may
prevent the wire from making adequate
contact.
7. Place each wire into the appropriate hole in the
terminal block and tighten the screw to secure the
wire. There is a label on the terminal block
corresponding to the color code for each wire.
The terminal block may be removed from the
module to allow easier connections.
8. Place the control switch module into the
mounting bracket. Use the two 1/4-inch acorn
nuts and lock washers to secure the control
switch module to the bracket.
5.3 Final Vehicle Wiring
1. Plug the Vehicle Interface Harness into the 15-pin
connector on the back of the control switch
module.
2. Route each of the wires to the appropriate
positions for termination. See the table below for
wire identification.
Wire Color Signal
TBD +12 VDC
TBD Ground
TBD Left Turn Signal input
TBD Right Turn Signal input
TBD Remote Activation
TBD Disable input
3. Connect the TBD wire to a 12 VDC power
source that provides at least x amps at all times.
In order for the GPS receiver to maintain an
accurate location, it is necessary to provide 12
VDC to the receiver at all times. Therefore, it is
necessary to connect to a constant12 VDC
source.
3M recommends that a direct connection to the
battery be used. If this is not possible, use a
terminal block with a direct connection to the
battery. Install the provided x amp fuse and fuse
holder. Attach the provided fuse size label.
4. Connect the TBD wire to vehicle chassis ground
(DC–). Again, it is recommended that this
connection be made directly to the battery or to a
terminal block with a direct connection to the
battery.
5. Connect the TBD wire to a switch that will
actuate when the driver reaches the scene and
steps out of the vehicle. This could be a door
switch, gear select switch, etc. The switch may
provide either +12 VDC or a ground.
6. In order for the vehicle equipment to transmit
turn signal information to the intersection
equipment, it is necessary to interface the vehicle
equipment to the vehicle turn signal indicators.
This is done by connecting the TBD & TBD
wires to the vehicle turn signal wires.
7. Connect the TBD wire to a point that allows
remote activation of the vehicle equipment. A
point that provides +12 VDC is required. A
switch that activates the light bar is the most
common point to make this connection.