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cbriggs1978
Newbie


Joined: 02 Sep 2018
Posts: 9



PostPosted: Tue Oct 23, 2018 10:41 pm    Post subject: replace pcm 1 with single din head unit - no sound Reply with quote

Hi,

I have a 2002 targa with PCM1 and bose (non most). Today I have done the centre console delete and moved a load of switches to accommodate that and have moved the HVAC panel up to to the top of the dash. Plugged in the new (Pioneer) head unit and it powers up but no sound - I assume the bose amp isnt waking up - Before I waste some cash, can someone confirm if I need to buy a separate harness - PC9-408 seems to be the one mentioned a lot by retailers but I cant find anything specific on a porsche forum! I believe it is an "active harness adaptor"?

Any help appreciated

Thanks

Chris
 
  
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eabeukes
Silverstone


Joined: 30 Jan 2018
Posts: 117


1999 Porsche 996 Carrera 2

PostPosted: Wed Oct 24, 2018 11:13 am    Post subject: Reply with quote

Can you post a photo of the wiring you currently have in place fro the new HU to the old cabling?
The amp takes a line-out feed from the OEM head-unit and you wont have that on your new one unless you get a harness.
 
  
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cbriggs1978
Newbie


Joined: 02 Sep 2018
Posts: 9



PostPosted: Wed Oct 24, 2018 1:22 pm    Post subject: Reply with quote

Thanks for the reply, I thought as the outputs from the pcm1 were isso connectors, that the Bose amp takes a normal 'speaker' output and amplifies / distributes it. Will try take a picture and post in a minute!
 
  
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Stotty
Silverstone


Joined: 17 Dec 2009
Posts: 135
Location: Surrey


PostPosted: Wed Oct 24, 2018 1:45 pm    Post subject: Reply with quote

You probably need a harness adapter.

I have a different system to you, but I found this site to be really useful when changing my head unit but retaining the stock amp and speakers...

https://www.bergvillfx.com/index.php/catalogsearch/result/?q=porsche+996

Just need to know what option code you have and then match it with the right harness.
_________________
2000 996, C2, manual, arctic/metropole, sunroof delete, Koni shocks, H&R -30 spring, Cup wheel, 170k miles. 2018 Touareg RLine Plus
 
  
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cbriggs1978
Newbie


Joined: 02 Sep 2018
Posts: 9



PostPosted: Wed Oct 24, 2018 7:49 pm    Post subject: Reply with quote

thanks for the replies, photos of what I have.

Looking at the various harnesses available then it looks like I do need to give a 12V signal to the amp to "turn it on" so I found some pin layouts online and put 12V to the wire in the yellow plug and hey presto all came signing into life! I dont want to cut the original car wiring so will look at wiring harnesses some more to identify the correct one! But now at least I know what I am trying to do is not impossible!
 



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cbriggs1978
Newbie


Joined: 02 Sep 2018
Posts: 9



PostPosted: Fri Oct 26, 2018 8:41 am    Post subject: Reply with quote

All sorted now, blue wire on new harness connected to single wire in yellow plug and all good. Bass was very boom boom to start with but has been tamed with the equaliser on the head unit. But definately need to look into connecting the head unit sub out to the separate little sub amp at some point.
 
  
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