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astra h to single din #816861
16th Aug 2013 8:23am
16th Aug 2013 8:23am
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joeblogs Offline OP
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as above i have all the bits fascia adapter put it all in and there is a long red wire that needs to be connected so head unit wont even come on? i have no idea about car electrics?

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Re: astra h to single din [Re: joeblogs] #816865
16th Aug 2013 8:37am
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Re: astra h to single din [Re: chris123] #816876
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got it,theres a red wire that needs to be connected to something i get no power to head unit

Re: astra h to single din [Re: joeblogs] #816882
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The red Wire is for an extra power feed, you will need to run it to a switched power source in the fuse panel.

Last edited by rhoobarb2002; 16th Aug 2013 10:00am.
Re: astra h to single din [Re: joeblogs] #816883
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Tried to add explanation but post edit time ran out smile

Anyway....

An aftermarket car stereo generally has 2 power inputs.

Constant Live and Switched Live. The constant live is to keep all your settings, etc. The switched is to turn the stereo on only when the ignition is on (stop the stereo draining the battery)

Some factory head units rely on an electronic system to tell them if the ignition is on or not so do not need the switched live. This is why the harness comes with a red switched live wire as your aftermarket stereo will not be able to use that system.

Its not hard to wire to the fuse panel.

Last edited by rhoobarb2002; 16th Aug 2013 10:08am.
Re: astra h to single din [Re: rhoobarb2002] #816928
16th Aug 2013 2:45pm
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ok how much to wire it up?

Re: astra h to single din [Re: joeblogs] #816932
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To do it yourself? A couple of quid.

How electronically/electrically minded are you?

Scotchlok/wire tap connectors are a cheap god send for those who are not so brave when it comes to wiring.

Like these:
http://www.maplin.co.uk/snap-lock-connectors-43076

Last edited by rhoobarb2002; 16th Aug 2013 3:12pm.
Re: astra h to single din [Re: rhoobarb2002] #819895
28th Aug 2013 11:46am
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When i fitted a sterie to my Astra G, there was a constant live and switched live, on was orange and one was red with a quick release connector. it was a case of disconnecting on of the wires half way along and connecting to the other wire.

So it yous is the same, you will probaly end up with a half orange, half red cable.

hope this helps.

Re: astra h to single din [Re: joeblogs] #820659
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Put bigger speakers in it make a DIN then

Re: astra h to single din [Re: nurvware] #821828
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Originally Posted by nurvware
When i fitted a sterie to my Astra G, there was a constant live and switched live, on was orange and one was red with a quick release connector. it was a case of disconnecting on of the wires half way along and connecting to the other wire.

So it yous is the same, you will probaly end up with a half orange, half red cable.

hope this helps.


Older cars did use both, but a lot of newer car factory stereos rely on the onboard computer/electronic/CANBUS system to tell them the ignition is on or off, so have done away with the switched wire in the factory harness.

Hence the spare wire in the aftermarket loom to wire to a switched live at the fuse panel.


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