Not charging

1994 CHEVROLET ASTRO
89,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
DONTTALKTOME
  • MEMBER
  • 2 POSTS
I bought this van as is. Which was not bad. Strong motor but not pretty. Mild driving. So now it needs to be jumped and I watch a voltmeter either jump around while I drive it and once, I turn it off, drains to about 9.5. I think it's a short that I can't find. Changed the alternator. And when I started again, I take disconnect the battery and it'll keep running so I knew it's not the alternator. Then all of a sudden it just starts to cough. It's not firing on the Pistons as good as it should be because it stutters a little bit. Could you please give me some ideas as to what might be wrong? And the battery is great, it's brand new. I can send you pictures of video or anything that that you need. why is running and you can tell me what's going on thank you so much.
Apr 13, 2022 at 10:18 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

The first thing I would recommend is to check for diagnostic trouble codes. This vehicle has an OBD1 system and doesn't require a scanner to retrieve codes. Here is a link that explains how it is done. Note: All you need is a short jumper wire or even a paper clip.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

Next, I need you to check the alternator output. I realize it is new, but are we getting enough voltage to keep the battery charged? When running, you should see approximately 14+ volts at the battery.

All you need is a voltmeter or a multimeter. Follow this link and let me know what you find:

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Start with this and let me know the results. If we find the alternator is working properly, then we will need to check for an electrical draw. Let me know if when the voltage drops if it eventually drains completely.

I will watch for your reply.

Take care,

Joe
Apr 13, 2022 at 1:35 PM
Avatar
DONTTALKTOME
  • MEMBER
  • 2 POSTS
Hey Mr. Joe, thank you for responding. I did take time to check the alternator and I was reading 14 and some change consistently. As I said I even pulled the battery when it was running and not even a skip in it. So, I'm assuming it got be a short somewhere. But I pull the paperclip method and get back to you again. Thank you so much. This has really been a pain because I can't even enjoy driving it is. Until next time. I'll even include a short okay, rt video if you wouldn't mind.
Apr 13, 2022 at 3:42 PM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

I will watch for your reply. I do have a question. If the vehicle sits overnight, does the battery drain?

Let me know.

Joe
Apr 14, 2022 at 5:34 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.