Table of Contents
Advertisement
12
5.1 Radio/GPS Module Installation
This subsection describes how to install the 3M™
Opticom™ GPS Priority Control System Radio/GPS
Module.
WARNING
Vehicle batteries contain sulfuric acid and
may contain explosive gases. Keep
sparks, flames, and cigarettes away.
Wear eye protection. Disconnect the
negative cable first to prevent shorting
the positive terminal to the chassis
when removing the positive cable.
Battery acid may cause skin irritation and
eye injury. Explosive gases may cause
severe injury or death.
1. Disconnect the battery before beginning the
installation. Disconnect the negative battery
cable first, then the positive battery cable.
2. Remove interior panels and headliners, as
necessary, to provide access for cable routing.
3. Using the Radio/GPS module as a template, mark
where you want to drill holes at the mounting
location.
4. Drill three 1/2-inch holes at the mounting
location.
NOTE: The installer may have to fabricate
special brackets to mount the Radio/GPS
module on some vehicles.
5. Place the three rubber Wellnuts into the holes.
6. Position the module over the Wellnuts and use
three 1/4-20 x 1/2 inch screws to secure the
module to the vehicle. Use removable loctite to
prevent the screws from loosening.
7. Mark the location of the entry hole for the
Radio/GPS module cable. Check the hole
location both inside and outside of the vehicle.
8. Drill a 1/2-inch hole for the vehicle equipment
cable entrance grommet.
9. Tape wrap the end of the vehicle equipment
cable to protect the wires and to ease cable
routing.
10. Select an appropriate size grommet from those
supplied. The grommets are supplied in three
sizes to allow for different thicknesses of vehicle
sheet metal.
11. Place the grommet on the cable and slide it
toward the module. Leave enough cable exposed
to reach the module.
12. Route the taped end of the cable from the module
mounting location to the control switch module
location.
13. Apply lubricant to the grommet, then insert it
into the hole in the vehicle body or lightbar.
(Window cleaner works well as a lubricant.)
14. Remove the wire entry cover from the
Radio/GPS module.
15. Disassemble the cable grommet and route the
cable through the plastic sleeve and the rubber
plug. Leave approximately 5 inches of cable
inside the cover and tighten the plastic sleeve to
secure the cable.
16. Strip approximately 3 inches of the outer jacket.
Be careful not to cut the wires inside.
17. Strip 1/4 inch of insulation from each wire.
NOTE: It is very important to not strip too
much insulation, which may lead to short
circuits; or too little insulation, which may
prevent the wire from making adequate contact.
18. 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.
19. Reattach the wire entry cover to the module and
tighten the screws. Push any excess cable back
inside of the vehicle. Allow some extra cable for
strain relief.
20. Dry the grommet and apply a sealant to the cable,
grommet, and vehicle to seal the assembly
against moisture penetration. (Silicone RTV is a
good choice for a sealant.)
21. Finish routing and securing the cable in the
vehicle. Use cable ties to secure all wires away
from heat sources and moving parts.
22. Remove the tape from the end of the vehicle
equipment cable.
Installation
Advertisement
Table of Contents
