Jump to content
×

Server Lease Renewal/Software Licenses
Our yearly server lease, software licenses, as well as hardware operating costs were due Dec 6th, 2017. Our current donations have fallen short of the funds we need to renew. Please consider a donation to help keep this site running...  THANK YOU

DONATE HERE

×

 

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must login to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Recommended Posts

My '01 996 Cab restoration project has the Litronic option, which seems to be a fancy way of saying Xenon. 

 

The low beam works on the passenger side only.  I replaced the pricey Xenon bulb on the driver's side, but it still does not work.  LHS low beam fuse seems ok.  Light switch seems ok. Any other ideas? Is there a left side headlight relay somewhere?

 

As an unrelated issue, when I pull on the turn signal stalk, both high beams work.  With the light switch turned clockwise to 'on' I push forward on the turn signal stalk to turn on the high beams (and it clicks forward and stays there) no high beam lights come on.  Am I missing something?   

 

  

Share this post


Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

Litronics is Porsche's copyrighted name for their Xenon lights.  If they are factory lits, you can scan the car and find out what is wrong, if they are not factory lits, check the non functioning light for tight connection.  It may also be the module for the light as well.

Share this post


Link to post
Share on other sites

A shot in the dark, no pun intended...  what about removing the light housing and checking all the pin slots to be sure you're getting a full engagement of the socket.  Also be sure the light socket is rigidly in place in the fender housing.

Share this post


Link to post
Share on other sites

The lights are factory. 

 

The error codes found by the reader for the headlights are:

 

Engine path left

Engine path right

Axle position sensor front

Axle position sensor rear

 

I have no idea what that means in the context of a headlight. 

 

I will remove and re check the pins, but they seemed fine.

 

Share this post


Link to post
Share on other sites

The Litronic headlights have a self-leveling function, with linkages to the front suspension and rear suspension.  Do they move up and down when you turn them on?  Also, for the Litronics there is a ballast (control unit) that fires the light.  Might check that out.  See parts here http://www.autoatlanta.com/porsche-parts/hardparts.php?dir=996-99-05&section=905-03

Share this post


Link to post
Share on other sites

If you had the Durmetric OBD reader you might be able to erase the codes.  I wonder if removing the battery 

cable for a minute or so that it might reset the computer...

Share this post


Link to post
Share on other sites
1 minute ago, creekman said:

If you had the Durmetric OBD reader you might be able to erase the codes.  I wonder if removing the battery 

cable for a minute or so that it might reset the computer...

 

It won't unless you find and fix the issue first.

Share this post


Link to post
Share on other sites

I don't understand the light movement idea, the bulbs inside large glass headlights turn left and right or up and down? There are motors in the headlights that do this?  Even if they do not actuate, the low beams should operate? I have not checked for movement - should it move when I turn the ignition on or the lights on?

Share this post


Link to post
Share on other sites

Headlight bulbs are separate connections from all movement motors.

 

The 9x6 series cars suffer from damage to the headlight connector in the fender - usually when someone slams the headlight into the carrier and it is not aligned properly.

I have seen bent pins, and broken connectors on both the socket in the fender as well as the headlight itself. I would certainly do some inspect there to start.

Share this post


Link to post
Share on other sites
4 hours ago, johnmh said:

I don't understand the light movement idea, the bulbs inside large glass headlights turn left and right or up and down? There are motors in the headlights that do this?  Even if they do not actuate, the low beams should operate? I have not checked for movement - should it move when I turn the ignition on or the lights on?

 

Only the projector lens in the upper center of the headlight moves (by small electric motors), which contains only the xenon bulb; the rest of the headlight does not move:

 

986_2004_9_05_905-01.jpg99663106020-2-02-03-04-porsche-911-996-r

Share this post


Link to post
Share on other sites

Fascinating. I will check the pins in the connectors today, the issue with finding a problem is the difficulty of replacing a connector with a broken or bent pin. I am less concerned if the motors do not swivel the reflectors (I can fix that later).  Can you confirm that item 2 (which I have replaced, perhaps unnecessarily) is the low beam bulb?  Or is the low beam bulb item 4?

 

Just so I know I am doing this correctly, I push the turn signal column forward to turn on the high beams?  Might it be possible they are not staying on because I am testing them in daylight?  Does the car know and prevent you from turning on the high beams in the day?

 

Considering it was a $6500 basket case to begin with, (with another $6k in parts in it) the car works amazingly well now; its fast, quiet and handles well. Once the lights are sorted I can begin to work on the convertible top. 

Share this post


Link to post
Share on other sites
21 hours ago, johnmh said:

My '01 996 Cab restoration project has the Litronic option, which seems to be a fancy way of saying Xenon. 

 

The low beam works on the passenger side only.  I replaced the pricey Xenon bulb on the driver's side, but it still does not work.  LHS low beam fuse seems ok.  Light switch seems ok. Any other ideas? Is there a left side headlight relay somewhere?

 

As an unrelated issue, when I pull on the turn signal stalk, both high beams work.  With the light switch turned clockwise to 'on' I push forward on the turn signal stalk to turn on the high beams (and it clicks forward and stays there) no high beam lights come on.  Am I missing something?   

I had a working system, then I replaced the high beams with LED's after install no high beams, being a EE no problem, HA all head light pins not bent, checked all powers on the pins, no power on high beams, finally found the light switch was the problem, if you have a wiring diagram and a voltmeter work your way back from the headlights, or take it to a dealer/repair shop and hold on to your wallet. 

  

 

7 hours ago, johnmh said:

Fascinating. I will check the pins in the connectors today, the issue with finding a problem is the difficulty of replacing a connector with a broken or bent pin. I am less concerned if the motors do not swivel the reflectors (I can fix that later).  Can you confirm that item 2 (which I have replaced, perhaps unnecessarily) is the low beam bulb?  Or is the low beam bulb item 4?

 

Just so I know I am doing this correctly, I push the turn signal column forward to turn on the high beams?  Might it be possible they are not staying on because I am testing them in daylight?  Does the car know and prevent you from turning on the high beams in the day?

 

Considering it was a $6500 basket case to begin with, (with another $6k in parts in it) the car works amazingly well now; its fast, quiet and handles well. Once the lights are sorted I can begin to work on the convertible top. 

 

Share this post


Link to post
Share on other sites

So, the high beam switch seems ok,  they come on, they go off. One problem solved. 

 

As for the left side low beam, the fuses for both low beams have 12v power and seem fine.

 

All pins on both connectors seem fine, nothing bent or broken.

 

With the power on, wire plug which connects to the headlights (in my fingers) has no +12v power on any of the four wires.  I assume it is the connector which runs the motor that aims the  headlight reflectors (so perhaps not the problem).  I did not check the voltage other 7 pins in the fixed connector as I suspect they may be high voltage. 

 

Can anyone post a photo of the actual bulb which emits the low beam?  I wonder of the Xenon Phillips bulb I replaced might just be a high beam.

 

 

IMG_2482.JPG

IMG_2483.JPG

Share this post


Link to post
Share on other sites

From the parts link I provided I count 5 bulbs in the unit.  That includes the fog light bulb and direction indicator bulb.  There is a halogen H11 bulb that I believe is the low beam light.  You can get one from almost every auto parts store.  Might be worth a try to just replace it with a new one.

Share this post


Link to post
Share on other sites

Several years ago I looked into replacing the plugs behind the dash for the 3 instrument clusters.  Each time I would remove the plug one of the keepers would break off.  I found a company that has these dash cluster plugs, but now I can't find the information.  I'm sure someone here knows where to look.  I've got one more place to look.  Sorry, I'm not more help...

Share this post


Link to post
Share on other sites

That's exactly why I need this plug - the lock/keeper broke off. I've found others from China that seem the same (form factor) but the original pins are larger and don't fit into the new shell...

Share this post


Link to post
Share on other sites

Over on a forum named "986 Forum" is a poster named "itsnotanove" who runs a Porsche Boxster specific junk yard and is a great source for impossible to find new parts.  As these 996 headlights are the same used in the Boxster, he should be able to source the connector and pigtail from one of his wrecks.

Share this post


Link to post
Share on other sites

I have plugs all over the place that have broken keepers.  The plugs will stay engaged and probably less stressful than trying to get all the wires back in the new socket.  Porsche spec a bad plastic for this.  I have a '65' T-Bird and the rubber plugs are perfect after 50 years.   My gripe is that Porsche has a great car but misses on some of these smaller items, and they seem to keep doing the same thing expecting a different outcome.

 

Mitch

Share this post


Link to post
Share on other sites

The broken clip does not worry me that much, as long as the plug stays in.  

 

I think when I replaced bulb no. 2 on that diagram I may have replaced the wrong bulb after all.  The low beam bulb may be number 4. 

 

Maybe an easy fix after all.   Thanks for pointing me towards the right direction.

Share this post


Link to post
Share on other sites

Ok, according to Pelican, part no. 2 is the low beam.  No idea which bulb is the high beam. I have replaced part no 2 and the low beam does not work.  Can anyone identify which bulb is which on a Litronic headlight?  Is the low beam a H11 or a H3 light?

Share this post


Link to post
Share on other sites

The low beam is the one that the ballast plugs into (#2) - it's a Xenon bulb, so you can't really mix it up with a Halogen...

 

JFP - I'll check into the 986 forum for that plug - Thanks (BTW - it's "itsnotanova" "a" not "e"... not too difficult to figure out though :cheers:)

Edited by dporto

Share this post


Link to post
Share on other sites
5 hours ago, dporto said:

The low beam is the one that the ballast plugs into (#2) - it's a Xenon bulb, so you can't really mix it up with a Halogen...

 

JFP - I'll check into the 986 forum for that plug - Thanks (BTW - it's "itsnotanova" "a" not "e"... not too difficult to figure out though :cheers:)

Then I am a bit screwed. The bulb is new, the fuse gets power. No light. No error codes on the scanner.  No ideas. I hate just throwing parts at it like a ballast (or whatever that box is).

Share this post


Link to post
Share on other sites

A few additional thoughts -

 

If the right side light works and the left low beam does not - the rotary light switch on the dashboard should be ok? All other switch settings seem to operate.

 

As well, as the high beams come on (on both sides), the plug in the back of the headlight should be fully seated in its receptacle, correct?  

 

I will check to see if some of the pins may be dirty or of the plug in the fender moves around.   

 

I suspect I can check all those headlight pins for +12v to narrow the issue further. 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×