My c5 inbuilt SatNav has an intermittent fault and keeps loosing the
satellites. Before I start to take anything apart, does anyone know if the
aerial cable from the back of the roof has a connector that may have come
apart, say somewhere near the A-post, or is it one cable. I have checked
the roof aerial connector and back of the head unit and the satnav cable is
Woodford Green, UK
There should be a map somewhere online showing all the cable connections. I
have a 99 Xantia and under the drivers seat there`s a cable that disconnects
now and then. This if for the warning lights on the dashboard so this cable
has taken a few years from my life. When all the lights go on....puh...
Before you start pulling anything apart be aware that there are all
sorts of reasons that a GPS receiver will lose lock on the satellites,
and that there may not be anything the matter with it. The signal from
the satellites is very weak, almost anything solid will stop it.
You need a clear view of the sky to get a lock. If, for example, you
spend a lot of time driving in towns or hilly areas tall buildings or
hills can interfere with the signal, blocking it out and causing
multipath reflections which can interfere with accuracy.
In towns with tall buildings is, of course, just when you need the GPS
most, and where it is likely to be least reliable!
None of this means that you haven't got a duff unit of course!
Even trees. My GPS almost always loses the satellites along some stretches
of road in open country but lined with trees. But I have no GPS aerial
built-in to the car, this is a portable Garmin Quest that relies on
'seeing the sky' through the windscreen.
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