Complete Head Unit re-wire
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=44027
Printed Date: July 17, 2025 at 10:17 PM
Topic: Complete Head Unit re-wire
Posted By: leading_edge
Subject: Complete Head Unit re-wire
Date Posted: November 29, 2004 at 6:33 AM
i recently bought a TE Gemini and want to install a head unit. i want to completely re-wire it so i know that everything is going to work first time. can somebody explain to me how to do this? what is needed? thanks in advance
Replies:
Posted By: bullman96
Date Posted: November 29, 2004 at 7:00 AM
it is relatively simple. get some 10awg and run it from the battery, to your dashboard. make sure you put a fuse on it near the battery that is rated the same as the deck or the most the wire can handle. then run your ground wire from the deck to where your amps are or will be and ground them all at the same spot. then run your remote wire and rcas down the opposite side of the car that the battery wires come in. the only 2 stock wires that you will use because it dooesn't matter how clean they are will be the acc wire that turns the deck on and if you have it, the power antenna. there is no point also in rerunning you antenna wire either, just plug it in. if you are running the speakers off the deckthen either use the existing wires or run all new ones.
Posted By: bullman96
Date Posted: November 29, 2004 at 7:01 AM
what is a te gemini anyways? dont know that car
Posted By: leading_edge
Date Posted: November 29, 2004 at 7:09 AM
it is an Australian car. Holden Gemini click here >>>> https://www.hotgemini.com/cgi-bin/gallery3.cgi to see HEAPS of pics
Posted By: leading_edge
Date Posted: November 29, 2004 at 7:11 AM
thanks heaps for the info as well :D
Posted By: bullman96
Date Posted: November 29, 2004 at 7:20 AM
talk to the guys who are on that site, things might be a bit different butit looks relatively easy to do. shouldnt take too long to run the wires.
Posted By: leading_edge
Date Posted: November 29, 2004 at 7:21 AM
do you know if it is possible to get a plug with all the required wires to set up the car for a new head unit so that i can use an adaptor plug to connect it to my new head unit?
Posted By: leading_edge
Date Posted: November 29, 2004 at 7:24 AM
the method you posted up is pretty much exactly what i was thinking so i will just do it that way.
Posted By: bullman96
Date Posted: November 29, 2004 at 7:28 AM
you might be able to find one, but looking at one of those, i would sugest redoing it. it didnt look like they had the stereo in mind when designing it
Posted By: DYohn
Date Posted: November 29, 2004 at 10:35 AM
The Holden Gemeni TE was (I believe) made for Holden by Isuzu. I would check with a local Holden dealer or service center for the stereo wiring diagrams, or even in a local library with a gfo0od reference section. A standard Isuzu harness may fit. In Australia, the most common wiring harness adapters are made by Aeropro (although their website seems to be down....) ------------- Support the12volt.com
Posted By: sparkyboy
Date Posted: December 06, 2004 at 5:50 PM
Hi Folks
This has the same body shape as a vauhall/GM chevette as used in the UK
https://www.rise12.freeserve.co.uk/dsg/noframes/proto.htm
As this has a flat nose it will be known in Germany as an opel kadett "these were around in the 80's here" and sold in America as the chevy Chevette
https://www.chez.com/yvincent/photo/chevrolet/sous_compacte/78chevette.html
Hope this helps when trying to find wiring details
Cheers Dan
-------------
OOOHH wheres that smoke coming from
Posted By: sparkyboy
Date Posted: December 06, 2004 at 6:09 PM
leading_edge
Just remembered we have a company called Maplins in the UK and if your car stereo uses the same connectors ISO then maybe you could find the same at Radio Shack and make a complete loom of power and speaker leads so all you have to do is plug in the Stereo and your away 
https://www.maplin.co.uk/Module.aspx?ModuleNo=27994&TabID
=1&source=15&WorldID=&doy=6m12
Cheers Dan ------------- OOOHH wheres that smoke coming from
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