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½cwt
Newbie


Joined: 01 Sep 2018
Posts: 36
Location: Kettering, UK


PostPosted: Wed Nov 07, 2018 3:48 pm    Post subject: Fitted New Head Unit Today - Now Horn Toots When I Lock It Reply with quote

So I fitted a new Kenwood head unit to replace the factory Becker unit in my 2000 Boxster S, great to have BT streaming and DAB radio and improved sound quality even from the OEM speakers. I also swapped out the CD storage unit in the lower console for a plain bin (Thanks 9apart) so have got decent storage for wallet and phones etc. Planning to remove the CD changer too for a bit more oddment space in the front.

One strange thing though; since I've changed the head unit when I lock the car it toots the horn once when the indicators flash. Any ideas? Question
 
  
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Robertb
Long Beach


Joined: 01 Sep 2003
Posts: 6649
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Wed Nov 07, 2018 4:59 pm    Post subject: Reply with quote

It means the car thinks something is not shut properly... did you by any chance fit an iPod cable or USB in the glovebox or centre armrest bin?

I fitted a kenwood unit too... looks good, actually quite OE once you get the illumination colour right.
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"911- the guilt-free supercar"

Current: 2003 C4S Coupe, seal/black

Ex: '02 C4S Coupe, '96 993 Targa, '88 Carrera Sport Coupe
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14298
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Wed Nov 07, 2018 5:02 pm    Post subject: Reply with quote

It's your head unit at a guess. When I fit mine I had a similar problem. The horn would toot as though something wasn't shut and then it kept tripping the alarm off. I ended up disconnecting the unit, leaving it a few hours then reconnecting it and it has been fine since. I put it down to something in the head unit constantly using power and putting a drain on the battery, which then triggered something in the alarm system.
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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eabeukes
Silverstone


Joined: 30 Jan 2018
Posts: 119
Location: Aylesbury

1999 Porsche 996 Carrera 2

PostPosted: Wed Nov 07, 2018 5:23 pm    Post subject: Reply with quote

Theres a pair of anti-theft alarm contacts inside the cage where the head unit fits which need to be pushed in when you install the aftermarket one. Most times its as simple as pulling it out and re-fitting that gets these pushed in enough to not set off the alarm.
 
  
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5359
Location: Brighton


PostPosted: Wed Nov 07, 2018 8:23 pm    Post subject: Reply with quote

Agree

Pull the wire off of the metal plate n/s of the radio .. its the alarm contact thats now earthed due to different radio / head unit thats causeing this .
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½cwt
Newbie


Joined: 01 Sep 2018
Posts: 36
Location: Kettering, UK


PostPosted: Wed Nov 07, 2018 8:35 pm    Post subject: Reply with quote

Thanks for the replies, I'll take to look at the weekend now I know what I'm looking for to solve the problem. That said the old unit took a hell of a pull to release; even with a pair of the official Porsche keys I needed to get hooks into their rings to be able to shift the unit without amputating my finger tips. Once it was out (undamaged) it looked like some excess tape adhesive or something had bonded the unit in place.

Nice solution from Porsche, haven't come across this before, that said last cars I replaced a head unit in were a 1996 Impreza Turbo and my step-daughter's 2000 SEAT 1.0 Arosa.... neither known for the even the perceived quality of their audio equipment. Then again the Porsche unit isn't exactly high end but the overall brand perception would make it a theft target I guess.
 
  
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½cwt
Newbie


Joined: 01 Sep 2018
Posts: 36
Location: Kettering, UK


PostPosted: Wed Nov 07, 2018 8:42 pm    Post subject: Reply with quote

The head unit I put in is a Kenwood KDC BT720DAB. As RobertB says the colour match of the display is quite good, I'm still playing with the brightness and custom RGB settings to improve the colour 'look and feel' to make it even better.
 
  
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Kbald
Trainee


Joined: 11 May 2018
Posts: 93
Location: West Yorkshire


PostPosted: Thu Nov 08, 2018 7:01 am    Post subject: Reply with quote

If youve got thin fingures you can remove the wire by removing the side boomerang panel on the ns and pull off the spade connector and just tape it up. Thats if its the same as the 996 but pretty sire it will be. Had the same problem on mine and did it this way to save removing the head unit again.
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½cwt
Newbie


Joined: 01 Sep 2018
Posts: 36
Location: Kettering, UK


PostPosted: Sat Nov 10, 2018 10:33 pm    Post subject: Reply with quote

My new head unit came with a short cage so I didn't need to remove any of the OE framework. There is a cable on a connect with a brow wire as noted above and there is also a square tab which is sprung towards the space the head unit occupies about 50mm back on the left hand side. I put a strip of insulation tape on this tab - case solved, no more toots.
 
  
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½cwt
Newbie


Joined: 01 Sep 2018
Posts: 36
Location: Kettering, UK


PostPosted: Sat Nov 10, 2018 10:34 pm    Post subject: Reply with quote

My new head unit came with a short cage so I didn't need to remove any of the OE framework. There is a cable on a connect with a brow wire as noted above and there is also a square tab which is sprung towards the space the head unit occupies about 50mm back on the left hand side. I put a strip of insulation tape on this tab - case solved, no more toots.
 
  
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