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For BMW car owners, BMW navigation(http://www.eonon.com/Car-GPS/Android-Car-GPS/GA5150F.html)
system is a helpful and easy-to-use addition to the car's dashboard,
especially if you spend a lot of time traveling through unfamiliar
areas. Some car manufacturers offer them as part of a vehicle's standard
options, but for those with older vehicles, or those who are less
willing to pay the expense of a dealer's markup, aftermarket navigation
systems are available to install.
Make Sure the Type of System You Prefer
Decide what kind of aftermarket navigation system you want. There are
three general types available: hand-held, portable and built-in
systems. Hand-held and portable systems are the easiest to install, but a
built-in system usually offers the most options.
Purchase a system that matches your car and your needs. Choose a
simpler hand-held system if you anticipate light use, and a portable or
built-in system for moderate to heavy use.
Compare cost effectiveness. Hand-held systems are the least
expensive, followed by portable systems. Expect to pay more for built-in
systems.
Installing a Portable System
Examine the dashboard for a place to install your portable
aftermarket navigation system. You generally want to choose a spot
that's about level with the remainder of your instruments. You should
take care not to block any other readouts or instrumentation, vents or
airbags.
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with navigation system. Install the attachment device for the portable
navigation system on the part of the dashboard you have selected. It's
usually Velcro, removable adhesive or a suction cup--something that will
hold the device, but which can be taken off and moved without too much
fuss.
Installing a Built-In System
Disconnect the negative cable from your battery. Attach the CPU of
the aftermarket navigation system to a position under the dash. Remove
the part of the dashboard that surrounds your old stereo system, and
detach the old system with a screwdriver. Detach the wiring connecting
the stereo to the electrical system as you do so. Connect the wires for
your navigation system into their appropriate positions in the back of
the stereo housing on the dashboard.
Check that the ground wire is properly connected. Connect the CPU
with the navigation system. Install the antenna at the point indicated
by the particular model you have purchased. It's usually placed along
the top of the dash, flush against the windshield of the car, and should
be securely mounted with a screwdriver or drill.
Connect the antenna cable to the CPU, taking care to keep the wiring
from dangling or interfering with any other driving functions.Connect
the microphone cable to the CPU, again taking care that the wiring will
not interfere with your driving.
Screw the navigation system into position in the stereo housing and
replace the dash covering. You may need to alter the dash in order to
get the new navigation system to fit properly.
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