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Carrerascott
Silverstone


Joined: 28 Mar 2015
Posts: 110
Location: West Yorkshire


PostPosted: Tue May 15, 2018 8:44 pm    Post subject: Rear fog lights Reply with quote

Quick question on 997.1 rear fog lights - is there a fog light bulb on each side or just the offside?
Just noticed that one of the 2 rear light reflector bulbs on my offside was out and whilst checking everything else noticed that the rear fog only came on on one side
Thanks
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weebz
Montreal


Joined: 05 Jul 2010
Posts: 522
Location: Nodnol


PostPosted: Tue May 15, 2018 10:02 pm    Post subject: Reply with quote

Usually you'll find that there's just a bulb in the offside.

However the near side should be wired in including the bulb holder, at least that's how it was on the 996 I used to have.

TBH I don't think I ever turned on my fogs in the 6 years I had it Very Happy
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2004 Atlas Grey 996 C4S - 'J-Lo' (sold)
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13140
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Wed May 16, 2018 5:16 am    Post subject: Reply with quote

On the 996 both bulbs were in and both lights wired up but the software was coded to only light one side, dependant on lhd or rhd. The reasons for this:

Safety - lighting one fog light means the driver behind won't mistake it as a brake light (even though many UK folk drive round with only a brake light working).

Manufacturing - Bosch made the light units and supplied them fully assembled with bulbs in. They wouldn't know the driving Position of the host car so just fit a fog bulb in every unit.

You can hard wire one side up to the other but I don't think its possible using the software, unless you can hack into it and rewrite it.
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2000 Manual 996 C4 Arctic Silver Convertible

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Phil 997
Donnington
Donnington


Joined: 05 Dec 2015
Posts: 12900
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Wed May 16, 2018 2:43 pm    Post subject: Reply with quote

alex yates wrote:
On the 996 both bulbs were in and both lights wired up but the software was coded to only light one side, dependant on lhd or rhd. The reasons for this:

Safety - lighting one fog light means the driver behind won't mistake it as a brake light (even though many UK folk drive round with only a brake light working).

Manufacturing - Bosch made the light units and supplied them fully assembled with bulbs in. They wouldn't know the driving Position of the host car so just fit a fog bulb in every unit.

You can hard wire one side up to the other but I don't think its possible using the software, unless you can hack into it and rewrite it.


Thanks Alex ,I often wondered why only one worked , todays lesson completed Grin Thumb
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Carrerascott
Silverstone


Joined: 28 Mar 2015
Posts: 110
Location: West Yorkshire


PostPosted: Wed May 16, 2018 5:54 pm    Post subject: Reply with quote

Thanks guys Thumb
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