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oldgit st
Newbie


Joined: 13 Nov 2014
Posts: 16



PostPosted: Mon Sep 09, 2019 1:34 pm    Post subject: new head unit and fuse Reply with quote

hi all,

ok, so at the weekend using posts from here and other sources ive fitted a Sony xavax3005 headunit.

I will do a write up soon when its all buttoned up but would like to ask/clarify something quickly.

I tapped the orange wire at rear of the aircon controls to give key present 12v feed to the headunit, works perfectly and supplies power to the headunit as soon as the key is inserted. My question is, does the spur from the orange wire to my head unit require an inline fuse ? ive noticed the sony stereo has a 10amp blade one in the rear of it.

With the lack of steering wheel controls I also added a Dongmao remote steering wheel pack (£16 on amazon) so I can control phone / google and volume etc etc and it works rearly rearly well, but again, the 12v power supply for this unit does not have an inline fuse, so its tapped to the headunit 12v power supply.

Just want to check on whether accessorys when tapped from another supply need inline fuses installed.

Also, for anyone installing a headunit (Sony at least) into a 997 non bose with ASK amp system, no steering wheel control, you can grab all the wires you need from behind the centre consol without the need for any adapter cables of any sort.
This includes the sony illumination wire (that dims the screen when car lights switch on).

I will say, the Sony headunit has 4x55w speaker output and whilst I totally thought the sound package plus (ASK amp) based system was rearly good, it does sound markedly better, presume the non amp driven speakers are now getting some oomph.

Anyway, I will try to do a detailed post when I can as I did find so many different posts on headunit connections but so many are for the BOSE systems.

Any help on the fuse question appreciated, oh and before you say it, I know I should know this if im fitting a system BUT I can follow wiring quite easy but just don't understand fuseology lol.

any help appreciated
cheers
 
  
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Hertsdriver
Spa-Francorchamps


Joined: 12 Nov 2018
Posts: 325
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Mon Sep 09, 2019 3:38 pm    Post subject: Reply with quote

IMO yes, fit a fuse.
You are drawing more current on whatever circuit you tapped into was drawing before, but the original fuse on that circuit was only rated for the amount it was drawing before you added additional load. That's why the ideal is to run a separate power source direct to an unused location in the fuse box (I ran one this way using a piggyback fuse holder).

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oldgit st
Newbie


Joined: 13 Nov 2014
Posts: 16



PostPosted: Mon Sep 09, 2019 5:18 pm    Post subject: Reply with quote

Cheers for the reply, I did start by doing that but being honest I wanted a key in ignition feed like standard, and cai post recommends tapping this source and TBH how many accessories i.e. Cameras satnavs etc etc don't all get wired into fuse box.... they get tapped into wires currently serving an accessory or am I wrong Dont know
 
  
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Hertsdriver
Spa-Francorchamps


Joined: 12 Nov 2018
Posts: 325
Location: Hertfordshire/London

2004 Porsche 997 Carrera 2

PostPosted: Tue Sep 10, 2019 9:01 am    Post subject: Reply with quote

Mine is ignition fed from the fusebox Wink theres loads of spare unused fuses to tap into, I think I used one for something to do with tiptronics (mines a manual)

Cameras, satnavs etc don't draw power to the same extent that a head unit with a built in amplifier does. Its your choice, might be fine with the way you have gone Dont know
 
  
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