CHASSIS MODIFICATIONS
2-61
DAILY 4x4
Print 603.93.761 Base - May 2007
Electrical System: Modifications and Drawing-Off Power
Follow the precautions below when connecting and arranging the wires:
- Use a top quality cable particularly as concerned to th e protective shielding.
- The cable route must be at a suitable distance (minimum 50 mm) from pre-existing wiring. Ensure the minimum distance from
the metallic stru cture of the cab. Avoid excessively pulling or pinching the cable. In stallation on the left or right-hand side is prefer-
able.
- Never shorten or extend the coaxial antenna cable.
- Use existing holes for routing the cable. Take all the necessary precautions for protecting the body if additional h ole have t o
be drilled (use anti-rust paint, sheath, etc.).
- Ensure a good connection with the vehicle earth both on the base of the antenna and at the device fixing to ensure maximum
power transfer.
Cellular telephones are typically fitted on the dashboard in gear lever area or in the header rail a bove the driver.
GPS antenna cable and navigation system installation
Correct and careful assembly of GPS antennas in the vehicle is extremely important for correct operation and maximum perform-
ance.
The antennas should if possible be fitted in a concealed position where they cannot be seen.
Arranging t h e GPS antenna is a delicate matter. The power of the signal received from the satellite is very weak (approximately
136dBm), so any obstacle can effect quality and performance of the receiver.
• The SWR must be as close as possible to one. The recommended value is 1.5, while the maximum acceptable value must not
in any case be greater t han 2 in the GPS frequenc y range (1575.42 +1.023 MHz).
• The AERIAL GAIN values must be as high as possible and ensure sufficient spatial uniformity, normally with deviations from the
average valu e in the order of 1.5dB in the 1575.42+1.023 MHz band.
The GPS antenna must be installed in a position ensuring maximum visibility of the sky.
The minimum angle of visibility must be 90°. Sky visibility must not be obscured by objects or metallic struct ures. The in stallation
position must be horizon t al.
The ideal location for the GPS antenna is under the plastic dashboard in the middle and at the base of the vehicle windscreen.
Do not install the ant en na u nder any type of metallic structure in the cab.
Position the GPS antenna at a distance which is not less than 30 cm from another antenna.
Follow the precautions below when connecting and arranging the wires:
- u se a top quality c able particularly concerning the protective shielding.
- The wire course must be at a suitable distance (minimum 50 mm) from pre-existing wiring. Ensure the minimum distance from
the metallic stru cture of the cab. Avoid excessively pulling o r pinching the c able. Installation on the left or right-hand side is
preferable.
- Never shorted or extend the coaxial antenna cable.
- Use existing holes for routing the cable. Take all the necessary precautions for protecting the body if additional holes have to
be drilled (use anti-rust paint, sheath, etc.).
- Ensure a good connection with the vehicle earth both on the base of the antenna and at the device fixing to ensure maximum
power transfer.
Navigation sy stems must be installed using the power system provided in th e vehicle. Connect to terminal 30 via a supplementary
fuse.
The devices must be legally type- approved an d fixed (not portable). Install t he transmitting part in a flat, dry area separate from the
electronic components of the vehicle, away from humidity and vibrations.
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