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JP_Turbo
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Joined: 27 Jan 2015
Posts: 56
Location: London


PostPosted: Wed Oct 04, 2017 9:48 am    Post subject: 997.1 Footwell light - N/S Not operating after changing bulb Reply with quote

Hi Guys,

As title suggests, I changed out my interior lights for the LED pack.

When changing them out I noitced that the drivers side footwell was illuminated and the passenger wasn't. I swapped bulbs around from a working bulb and still no joy.

Anyone can shed and "light" on this matter? Very Happy

Glove box light and all other lights are fine. Just this one is not coming on? So I am assuming it cannot be the fuse...
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Clanky
Imola


Joined: 24 Aug 2012
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Location: Scotland

2007 Porsche 997 Turbo

PostPosted: Wed Oct 04, 2017 11:06 am    Post subject: Reply with quote

Try turning the bulb around, assuming it is a "festoon" type.

Most of the LED units are polar so have to have the + & - the correct way round.
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JP_Turbo
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Joined: 27 Jan 2015
Posts: 56
Location: London


PostPosted: Wed Oct 04, 2017 11:15 am    Post subject: Reply with quote

Clanky wrote:
Try turning the bulb around, assuming it is a "festoon" type.

Most of the LED units are polar so have to have the + & - the correct way round.


Tried this already. I took out the glove compartment one which was illiuminating and then plugged it straight in. Also I tried a normal filament bulb still no joy.

All connections seem firm so no loose connections there either

Question
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-- 997 --
Imola


Joined: 11 Jun 2015
Posts: 843



PostPosted: Wed Oct 04, 2017 4:40 pm    Post subject: Reply with quote

Fit the old bulb in to see if it comes on, if not then check the plug that goes in the bulb holder, ideally I would get a multi meter to check if there are any power...

J
 
  
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seeforez
Barcelona


Joined: 10 Jan 2016
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PostPosted: Wed Oct 04, 2017 6:46 pm    Post subject: Reply with quote

Have you tried disconnecting the battery and leaving it for 30 mins and then re-connecting....i can recall something weird happens if you accidentally short the light when removing it? I can't remember how to fix it though
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Demort
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Joined: 21 Mar 2015
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PostPosted: Wed Oct 04, 2017 7:24 pm    Post subject: Reply with quote

It might need a vehicle handover useing a tester , its controled by i think the vesa cu so that would need a tester for fault codes etc .

I dont think theres any seperate fuses , certainly not one for each individual light .

Did it work before you started ?

I can dig out a wiring diagram if needed but i would kinda think this is down to a control unit messing around .
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JP_Turbo
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Joined: 27 Jan 2015
Posts: 56
Location: London


PostPosted: Thu Oct 05, 2017 11:05 am    Post subject: Reply with quote

-- 997 -- wrote:
Fit the old bulb in to see if it comes on, if not then check the plug that goes in the bulb holder, ideally I would get a multi meter to check if there are any power...

J


Tried this no Joy. The lead on my multi meter has spilt so cant use it to check if there is voltage there Sad
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JP_Turbo
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Joined: 27 Jan 2015
Posts: 56
Location: London


PostPosted: Thu Oct 05, 2017 11:06 am    Post subject: Reply with quote

seeforez wrote:
Have you tried disconnecting the battery and leaving it for 30 mins and then re-connecting....i can recall something weird happens if you accidentally short the light when removing it? I can't remember how to fix it though


I think you are right.

I think it worked before but not 100% sure if it did. I just left it for the time being and its been a while since I have had time to fiddle.

Will disconnect the battery and try again - I lose trip values when I do this though right?
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JP_Turbo
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Joined: 27 Jan 2015
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Location: London


PostPosted: Thu Oct 05, 2017 11:08 am    Post subject: Reply with quote

Demort wrote:
It might need a vehicle handover useing a tester , its controled by i think the vesa cu so that would need a tester for fault codes etc .

I dont think theres any seperate fuses , certainly not one for each individual light .

Did it work before you started ?

I can dig out a wiring diagram if needed but i would kinda think this is down to a control unit messing around .


Do you mean I need to get it tested with diagnostics?

My friend works for the AA and it didnt bring up anything on the bosch system
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Demort
Estoril


Joined: 21 Mar 2015
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PostPosted: Thu Oct 05, 2017 5:59 pm    Post subject: Reply with quote

Ok i did a bit of digging , both lights are controled by the vesa cu but both are linked so that if one works then the other should .. need to check the non working one with a meter to see what you are missing .

Diag below .
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JP_Turbo
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Joined: 27 Jan 2015
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Location: London


PostPosted: Fri Oct 13, 2017 2:53 pm    Post subject: Reply with quote

Demort wrote:
Ok i did a bit of digging , both lights are controled by the vesa cu but both are linked so that if one works then the other should .. need to check the non working one with a meter to see what you are missing .

Diag below .


Thanks for this mate. Still aint had a chance to disconnect battery for 30 mins. But I can imagine this isnt going to help the situation?
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Demort
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Joined: 21 Mar 2015
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Location: Sussex


PostPosted: Fri Oct 13, 2017 6:48 pm    Post subject: Reply with quote

I doubt it now that i have looked at the wiring diagram .. both sides are linked so if one works then the other should .

I would start with a meter on the non working one and check for an earth and a feed on each wire , disconnect the wires from the lamp first then check , see whats missing .. if neither are then its the bulb or the lamp .. if feed or earth is missing then its a break in the wire ..

You can trace to the fault or run a bypass wire as per the diagram .
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JP_Turbo
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PostPosted: Mon Oct 16, 2017 9:09 am    Post subject: Reply with quote

Demort wrote:
I doubt it now that i have looked at the wiring diagram .. both sides are linked so if one works then the other should .

I would start with a meter on the non working one and check for an earth and a feed on each wire , disconnect the wires from the lamp first then check , see whats missing .. if neither are then its the bulb or the lamp .. if feed or earth is missing then its a break in the wire ..

You can trace to the fault or run a bypass wire as per the diagram .


Where is the unit located? Might just have to follow the cable from there or vice versa
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Demort
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Joined: 21 Mar 2015
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PostPosted: Mon Oct 16, 2017 3:04 pm    Post subject: Reply with quote

This is for a LHD car so yours will be on the opposite side , above and to the left of the fuse board .. there are other control units there though .

This will have x2 plugs in it .
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stucart
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Joined: 24 Apr 2013
Posts: 295
Location: staffordshire 07 997 C4S


PostPosted: Mon Oct 16, 2017 8:21 pm    Post subject: Reply with quote

Have you tried swapping the complete light unit out not just the bulb? I blew my glovebox light trying fit LEDs and there is a resistor contained it the light, perhaps that might have failed? ( on mine it was the micro switch that I’d blown, not applicable in your instance ) perhaps worth a try?
Got a spare lamp unit if swapping works.
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JP_Turbo
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Joined: 27 Jan 2015
Posts: 56
Location: London


PostPosted: Tue Oct 17, 2017 9:38 am    Post subject: Reply with quote

stucart wrote:
Have you tried swapping the complete light unit out not just the bulb? I blew my glovebox light trying fit LEDs and there is a resistor contained it the light, perhaps that might have failed? ( on mine it was the micro switch that I’d blown, not applicable in your instance ) perhaps worth a try?
Got a spare lamp unit if swapping works.


You know what. I think this happened to me too. I blew the glovebox light then swapped it over from the footwell light. But I am pretty sure when i swapped the orginal footwell light back to the footwell it didnt work?!

It was a month or two back now. Perhaps I will put the working glovebox light back into the footwell one and try but I am pretty sure I tried this.

Might need that lamp unit, also need to get hold of a multi meter!
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JP_Turbo
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Joined: 27 Jan 2015
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PostPosted: Wed Oct 25, 2017 10:42 am    Post subject: Reply with quote

Just to update the thread should anyone else have this sceanario - Turns out it is a defective bulb holder - Thanks to a fellow forum member there should be one in the post as I speak Thumb
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