Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat

 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 09-29-2013, 02:46 PM   #1
Registered User
 
Join Date: Jan 2007
Location: BC
Posts: 1,346
Alternator?

If anyone can help me with suggestions for this electrical problem, that would be much appreciated.

I hadn’t driven the car for a few weeks, but put the CTEK battery tender on it a few days ago, and it went green a day or so later. I drove to work (about 100 km) on Thursday, and at the end of the day before I started the car I put the top down, which went really slowly in retrospect. I stopped once for a few minutes on the way. When I got home I turned off the engine, then tried to restart a minute later. All I got was a few clicks and weird lights in the dash. Jumper cables easily started the car. After driving it about another 10 km and shutting it off, I tried starting it again right away; no go, with same low battery symptoms.

Battery last replaced April 2011. Ignition switch replaced last summer (had trouble getting the key out). I've been having some issues with the central locking for some months now – sometimes I get the proper lock and alarm activation (2 flashes) and sometimes I get only one flash and the beep. I also just noticed that the spoiler wasn't all the way down, but manually lowering it worked.

The voltage across the battery when it was flat was 11.65. I tried the battery open-circuit voltage test from the Bentley manual and got 11.51 after leaving the lights on for about a minutes. Then I charged the battery again with the CTEK until green light, and did the test again. 13.15V dropped to 12.82.

I started the car ok, ran it for about a minute, shut it off and measured 12.90. Leaving it and coming back the next day I measured 12.93.

Today while running the engine I measured about 14V initially, but this steadily dropped until I shut the engine off at 12.5V. The voltage drop was slowed by revving higher.

I store the car for the winter, but use the CTEK maintainer.

Battery? Alternator? Voltage regulator?? Any suggestions welcome. Thanks.
__________________
2001 Boxster, 5 spd, Seal Grey
clickman is online now   Reply With Quote
 



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 05:08 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page