Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, WERE due Dec 4th, 2022. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

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 log in 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 (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • 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)

Strange voltage regulator behavior...

Recommended Posts

Hello All,

Weird thing happened with my 02 996 yesterday... It's a 6 speed, vert...

Driving to work, my voltage gauge started jumping from 14 - 11 volts.. back and forth.. Okay, my regulator is going out. Seen it before...

Work all day.. go out, get in the car, it charges normal for about 10 minutes, then starts jumping again when things warm up. Just about home... I'm about 200 yards from home and the voltage regulator pegs at full charge.. then my ABS and brake warning lights come on.. I turn in the driveway and turn the thing off... Lock the doors.. Go in, and order a regulator from Pelican...

The next day, it's going to rain, so I think, I'll put the car in the garage. I go out.. and my drivers side window has lowered about 3 inches.. and my remote won't open the door. I manually unlock it.. and sure enouhg. The batter is dead... the key in the ignition does nothing.. no dome lights.. nothing. But, the red warning indicator on the radio is blinking.... Hmmm.

I hook up a battery to the hot post in the fuse box to try and get the hood open.. Hit the positive terminal, the alarm goes off.. the key in the door does nothing, nor can I get the hood or truck unlatched...

I'm scratching my head here.... and kinda freaking out because the thought of towing this to the dealer has my wallet puking! I'm good mechanically, and can do most anything.. but I don't know where to ever start on this? Blown fuses maybe????



Edited by Loren
fixed model year
Link to comment
Share on other sites

  • Moderators

Everything you have described is voltage related. A bad battery and/or alternator will cause the ABS and PSM MIL's to light up, the radio indicator is a low voltage LED which will work when the battery won't turn the car over, the alarm often goes off when the battery is first reconnected, etc. Get the voltage regulator or alternator tested and replaced, recharge the battery (if it has not been permanently damaged by all this) and have it load tested, and you should be back in business. Nothing unusual.

Link to comment
Share on other sites

Thanks for the response!

I agree with everything you said... and it all makes sense. What baffles me is why I apply power to the red post in the fuse box to unlatch the hood, it doesn't work!!!! The alarms sounds loud and strong.. not like I have a weak batter connected to it. But the key in the door will not disable the alarm, nor will the hood or trunk unlatch. Gotta be a fuse right???

Link to comment
Share on other sites

  • Moderators

No. A very weak battery will sometimes draw all the power when you use the fuse box to try and get the trunk open. The alarm has "priority" in the electrical circuits over other stuff. All this is classical low voltage headaches which will disappear when the battery is charged and the alternator is back online.

Link to comment
Share on other sites

Jgaude, JFP is absolutely right. Low voltage does screwy things to these cars. You are the second person who reports that their electric emergency trunk opening circuit did not work. If you use a high enough current device such as a powerpack used for jump starting cars you might get it to work.

A bad battery in my car resulted in a blown PCM and instrument cluster to the tune of $9000! (under warranty). One of the cells was shorted out. If your battery is over 5 years old or has been deep cycled it may be your only problem. The battery's date of manufacture is usually stamped on one of the posts. you may need a magnifier to see it. Regardless it is probably toast now anyway. There is an emergency trunk release cable in your driver's side wheel well up high towards the front. Pull the cable to open your trunk. Then replace the battery. If everything works OK then you are in business if not then you can start in with voltage regulators, alternators and such. As JFP suggests it might be a good idea to have the car load tested to make sure the car is not drawing too much current. Braille makes a great battery for these cars which is a direct fit and it is over 1000 CCA (the stock battery is 650 CCA) Suncoast Parts carries them. http://www.suncoastparts.com/product/B10049.html?Category_Code=996braille

Edited by Mijostyn
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.