996TT Headlight problem

[dlipka]

Hi - I am looking for some help.  The headlights are the litronic ones.

 

I don't drive the car very often - maybe once a month and often this is in the daylight.

 

I had a headlight globe 'fail' about 12 months ago.  I replaced it and everything seemed good.  Then it stopped working.  Then it started working.  Then both headlights stopped working - some of the time.  I am beginning to think that this is possibly not a globe problem.

 

Any suggestions?

 

Thanks,

 

Derek 

[stephan1964]

Suggest you check the main light switch in the dashboard. I also had some problems until I replaced it.

[royp4]

A worn or defective ignition switch can cause strange electronic gremlins too.

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[jpflip]

Agree with the light switch! It is 996-613-535-00 and not too difficult to replace especially with a good DIY ;-)

 

https://www.6speedonline.com/forums/996-turbo-gt2/176814-diy-head-light-switch-remove-replace.html

[dlipka]

Thanks everyone for all the help.

 

Does the head light 'driver' (the box that steps up the voltage for the lights) ever fail?

[Andy Francke]

I recently went through this with a new (to me) 2004 996tt.

 

Bottom line is that the headlight switch needed replacing - once I got it out and shook it, it made noises like a maraca from all the plastic that had disintegrated inside - but it wasn't the main problem.

 

Instead, the insulation on the wiring inside the headlamp assemblies was crumbling and I believe shorting out. Take a look and remedy if so (rewrap wires or replace). Be very careful when replacing headlamp assemblies into car that you do not bend pins on the electrical connector - check that none are bent already.