What volts should my battery & alt read
Posted
#1673894
(In Topic #242489)
![Avatar](https://vwgolfmk1.org.uk/uploads/ocf_avatars/Image1587331339917.jpg)
Old Timer
![mk1newbie in the usergroup ‘Old timer’ mk1newbie in the usergroup ‘Old timer’](https://vwgolfmk1.org.uk/themes/default/images_custom/XW2jYK6.png)
I've got a 1.5 JB engine and was just wondering what voltage the battery and the alternator should read when the alt is charging the battery? And what would cause the voltage reading to fluctuate at both the battery and alt
Thanks
Sent from my SM-G973F using Tapatalk
Lemon Yellow Tin Top Restoration
http://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=your-mk1-golfs_2%2Flemon-yellow-tin-top&kfs79=30
http://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=your-mk1-golfs_2%2Flemon-yellow-tin-top&kfs79=30
Posted
![Avatar](https://vwgolfmk1.org.uk/uploads/ocf_avatars/blue.png)
Local Hero
![Briano1234 in the usergroup ‘Local hero’ Briano1234 in the usergroup ‘Local hero’](https://vwgolfmk1.org.uk/themes/default/images_custom/2T6Iw1M8.png)
The normal battery voltage when running is 13.5-14V.
The Alternator should be putting out 13.5-14V. with nothing running electrically.
Which alternator do you have the Motorola style with a PLUG and the Regulator is flush to the Case.
![Screen Shot 2024-05-04 at 6.49.26 AM.png Screen Shot 2024-05-04 at 6.49.26 AM.png](https://res.cloudinary.com/mk1-golf-owners-club/image/upload/c_limit,w_768,f_auto,q_auto/v1714820111/uploads/attachments/6636140ed539e.png)
Or
The Bosch 2 stud One large and one small with a exposed regulator assembly?
![Screen Shot 2024-05-04 at 6.43.20 AM.png Screen Shot 2024-05-04 at 6.43.20 AM.png](https://res.cloudinary.com/mk1-golf-owners-club/image/upload/c_limit,w_768,f_auto,q_auto/v1714820119/uploads/attachments/663614166d357.png)
The second part have you verified that you don't have bad earths, or main leads to your battery?
Do my quick test to check your grounds.
https://www.volkswagenownersclub.com/threads/brianos-quick-grounds-test.134637/
If you see vast improvements then you should replace your battery to frame and frame to Engine earth.
Here is a good tune up for the Bosch 2 stud.
https://www.volkswagenownersclub.com/threads/mk1-bosch-posted-alternator-tune-up.135143/
Removing the Voltage Regulator isn't a bad thing, and you can check your stators (copper bits at the back of the alternator) for wear and cleanliness.
What do Divorces, Great Coffee, and Car Electrics all have in common?
They all start with GOOD Grounds.
Where are my DIY Links?
They all start with GOOD Grounds.
Where are my DIY Links?
Posted
![Avatar](https://vwgolfmk1.org.uk/uploads/ocf_avatars/Image1587331339917.jpg)
Old Timer
![mk1newbie in the usergroup ‘Old timer’ mk1newbie in the usergroup ‘Old timer’](https://vwgolfmk1.org.uk/themes/default/images_custom/XW2jYK6.png)
Lemon Yellow Tin Top Restoration
http://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=your-mk1-golfs_2%2Flemon-yellow-tin-top&kfs79=30
http://vwgolfmk1.org.uk/forum/index.php?page=topicview&id=your-mk1-golfs_2%2Flemon-yellow-tin-top&kfs79=30
0 guests and 0 members have just viewed this: None.