Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> No Alt. light after start up but battery not topping off ..
Literati914
post Aug 9 2025, 10:35 AM
Post #1


Advanced Member
****

Group: Members
Posts: 2,053
Joined: 16-November 06
From: Dallas, TX
Member No.: 7,222
Region Association: Southwest Region
My battery was bought last month.. Alternator light comes on with the key on, but goes out at start up. Battery keeps running low and eventually won't start the car. Does this point to anything usual - VR maybe?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
GregAmy
post Aug 9 2025, 10:44 AM
Post #2


Advanced Member
****

Group: Members
Posts: 2,531
Joined: 22-February 13
From: Middletown CT
Member No.: 15,565
Region Association: North East States
QUOTE(Literati914 @ Aug 9 2025, 11:35 AM) *
Does this point to anything usual - VR maybe?

What is the voltage directly at the battery when the car is running?

post #15 in this thread is gold: http://www.914world.com/bbs2/index.php?showtopic=326479

https://www.pelicanparts.com/techarticles/9...roubleshoot.htm

https://www.pelicanparts.com/techarticles/9...roubleshoot.htm
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
fixer34
post Aug 9 2025, 11:24 AM
Post #3


Senior Member
***

Group: Members
Posts: 1,316
Joined: 16-September 14
From: Chicago area
Member No.: 17,908
Region Association: Upper MidWest
Could be several things but VR is a likely suspect. Had this same thing for quite a while, went thru several old style VRs (used). Voltage to battery was around 12, so enough to turn off the light but not adequately charge.
Finally installed Bosch electronic VR, that did the trick.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
TheCabinetmaker
post Aug 9 2025, 12:04 PM
Post #4


I drive my car everyday
*****

Group: Members
Posts: 8,350
Joined: 8-May 03
From: Tulsa, Ok.
Member No.: 666
Check the belt tension
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 10th August 2025 - 11:05 AM
Invision Power Board v9.1.4 © 2025  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...