Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 03-29-2008, 10:02 PM   #1
Registered User
 
Join Date: Mar 2008
Location: Los Angeles, CA
Posts: 17
Odd problem, electrical, battery discharging...ignition?

I just my 2002 Boxster S last week.

So last night while driving the battery warning/generator light comes on. It was late so I didn't do anything about it. This morning I go to start the car and its dead as a doornail, so I figure bad battery. I jump start it, and then go to buy a new battery. On the way there, the ABS failure light and the Brake Distribution warning light both come on. I clicked through them but they came back on and kept beeping upon accelerating (really annoying). The radio as well would restart itself. After a couple miles I guess the warning lights gave up and it just went to a check engine/service engine soon light.

So my theory/guess is this is the ignition switch/cylinder problem (hence the reason the radio would turn off/back on while driving and the warning lights would reset themselves).

Has anyone had anything like this and if so, was this the problem? What parts do I need to fix it assuming this is the issue?

Thanks in advance.

brent95m3 is offline   Reply With Quote
Old 03-30-2008, 11:02 AM   #2
Registered User
 
Join Date: Aug 2004
Location: Canada
Posts: 188
Install a known good battery and test the charging system.
wvicary is offline   Reply With Quote
Old 03-30-2008, 11:49 AM   #3
Registered User
 
Lil bastard's Avatar
 
Join Date: Feb 2008
Location: Du Monde
Posts: 2,199
Sounds like the ignition switch.

You need PN# 4A0.905.849.B . Porsche doesn't want to sell just the electrical switch anymore, they want to sell you a whole new Unit - more work and more $$.

This switch is made for Porsche by MEYLE Products in Germany and their PN# is 100.905.0000 - it is a direct cross-referenced replacement.

Do a search here and in the DIY section for replacement instructions, should take you under 30 min. to switch it.

Then to test the Battery/Alternator, use a DMM to check voltage between the battery terminals (Car OFF) - s/b no more than 13.2volts. Then start the car and check again. This time, the DMM should read between 13.8-14.2 volts - this is the alternator voltage. If higher, it could be cooking the battery because the internal voltage regulator has blown 1 or all of it's diodes.
__________________
1990 Porsche 964 Carrera 4 Cabriolet
1976 BMW 2002
1990 BMW 325is
1999 Porsche Boxster
(gone, but not forgotten)
http://i933.photobucket.com/albums/a...smiley-003.gif

Never drive faster than your Guardian Angel can fly!
Lil bastard is offline   Reply With Quote
Old 03-30-2008, 12:27 PM   #4
Porsche "Purist"
 
Paul's Avatar
 
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,064
Garage
Sounds like a charging system issue to me. Have your existing battery checked before you trash it.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...
Paul is offline   Reply With Quote
Old 03-30-2008, 12:28 PM   #5
Porsche "Purist"
 
Paul's Avatar
 
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,064
Garage
BTW driving a car like ours with a failed charging system can harm many of the electronics.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...
Paul is offline   Reply With Quote
Old 03-30-2008, 12:30 PM   #6
pk2
Registered User
 
Join Date: Aug 2007
Location: Tustin Ca.
Posts: 449
It sounds like it could be the generator, If It stops working, the battery goes down to “not much”. Down to this point, theres not the juice to hold the memory in your radio and anything else powered. Idiot lights abound.

Any big box auto parts store can give your battery a quick load test to determine it's health (I think it will also test your generator). A charging generator will put out 13v+ at the battery with a load on. A bad one wil read 11v or less at the battery (while it running & with a few things turned on.

You don't really need to drop a $100 on a new battery just find out it's not the problem.

Regards, PK
__________________
http://img87.imageshack.us/img87/163...58x6ir4.th.jpg
99 Supercharged 2.5L

Last edited by pk2; 03-30-2008 at 12:42 PM.
pk2 is offline   Reply With Quote
Old 03-30-2008, 12:36 PM   #7
Porsche "Purist"
 
Paul's Avatar
 
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,064
Garage
Quote:
Originally Posted by brent95m3
I just my 2002 Boxster S last week.
This morning I go to start the car and its dead as a doornail, so I figure bad battery. I jump start it, and then go to buy a new battery. On the way there, the ABS failure light and the Brake Distribution warning light both come on. I clicked through them but they came back on and kept beeping upon accelerating (really annoying).
Thanks in advance.
So idiot lights and a beeper were not enough to make you stop driving it???

Maybe Porsche needs to add an electric shocker to your driver's seat?
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster bought new. Installed used motor at 89k.
1987 924S. 2002 996TT. PST2
Owned and repaired Porsches since 1974. Have driven them all the way the Dr intended...
Paul is offline   Reply With Quote
Old 03-30-2008, 09:17 PM   #8
Registered User
 
Lil bastard's Avatar
 
Join Date: Feb 2008
Location: Du Monde
Posts: 2,199
Quote:
Originally Posted by Paul
So idiot lights and a beeper were not enough to make you stop driving it???

Maybe Porsche needs to add an electric shocker to your driver's seat?
+1 though I did not wish to be the one to say it...
__________________
1990 Porsche 964 Carrera 4 Cabriolet
1976 BMW 2002
1990 BMW 325is
1999 Porsche Boxster
(gone, but not forgotten)
http://i933.photobucket.com/albums/a...smiley-003.gif

Never drive faster than your Guardian Angel can fly!
Lil bastard is offline   Reply With Quote
Old 03-31-2008, 10:56 PM   #9
Registered User
 
Join Date: Mar 2008
Location: Los Angeles, CA
Posts: 17
Well it turned out to be the alternator. I had it towed to a shop this morning. Just wanted to let you guys know I didn't continue to drive it other than home that day, but thanks for your input.

brent95m3 is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 04:14 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page