PT Cruiser Forum  
Advertisements
       

Go Back   PT Cruiser Forum > General Forums > Tech & Performance Forum

PT Cruiser Forum

Advertisements
Battery Charging problems.

 
Like Tree6Likes

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 22 Jul 2018, 02:14 am
Fresh Cruiser
 
Join Date: Apr 2016
Posts: 10
Default Battery Charging problems.

So the battery light came on and I've discovered my battery is not getting charged (after buying a new battery).

Now, before I got about replacing the alternator, I've read that I should do a voltage drop test on it first. Thing is, I can't for the life of me figure out how I can get my multimeter connected to the + terminal on the alternator. I have a 2005 turbo lite and the back of the alternator is packed in under a lot of stuff. And even if I did figure out that it's a wire problem, I have no idea how I would be able to removed the wires without removing the whole alternator.

Anyone have any tips on how to verify where my charging problem is without major disassembly?
Reply With Quote
  #2 (permalink)  
Old 22 Jul 2018, 02:49 am
Senior Cruiser
 
Join Date: Jan 2013
Posts: 1,266
Default Re: Battery Charging problems.

Connect the meter to the battery posts. With the car off it should read ~12.6 volts. Start the car and it should read ~14 volts. [13.5 to 14.5 volts]. Also check the fusible link on the large lug at the starter.
Reply With Quote
  #3 (permalink)  
Old 22 Jul 2018, 04:08 am
Fresh Cruiser
 
Join Date: Apr 2016
Posts: 10
Default Re: Battery Charging problems.

I have done that, when the car is running I'm getting 11.98v on a brand new battery. The battery is not charging. The fusible link is fine, but before I start pulling the engine apart to get out the alternator I'd like to test the wire coming off the + post on it (as is suggested in many many articles on alternator problems). I just don't know how to get to the + post on it without pulling it out, it's so buried in the engine. I don't have a garage or driveway so I'll be doing this either in a borrowed space or in front of my storage unit, either way I'd like to verify it's not the wires before I go out and buy another alternator.
Reply With Quote
  #4 (permalink)  
Old 22 Jul 2018, 05:12 am
Senior Cruiser
 
Join Date: Jan 2013
Posts: 1,266
Default Re: Battery Charging problems.

Keep in mind that the alternator field circuit must be working in order for current to be produced. I don't have a wiring diagram to help you.

The alternator comes out through the wheel well. The manual says to remove the axle shaft.
Reply With Quote
  #5 (permalink)  
Old 22 Jul 2018, 12:58 pm
Obsessed Cruiser
 
Join Date: Aug 2014
Location: Thousand Oaks, CA
Posts: 7,475
Default Re: Battery Charging problems.

This diagram is for a 2003 Pt Cruiser.

2003 chargingsys diagram.jpg
__________________
If at First You Don't Succeed - Try, Try Again
Reply With Quote
  #6 (permalink)  
Old 22 Jul 2018, 01:03 pm
Obsessed Cruiser
 
Join Date: Aug 2014
Location: Thousand Oaks, CA
Posts: 7,475
Default Re: Battery Charging problems.

Quote:
Originally Posted by nebular View Post
I have done that, when the car is running I'm getting 11.98v on a brand new battery. The battery is not charging. The fusible link is fine, but before I start pulling the engine apart to get out the alternator I'd like to test the wire coming off the + post on it (as is suggested in many many articles on alternator problems). I just don't know how to get to the + post on it without pulling it out, it's so buried in the engine. I don't have a garage or driveway so I'll be doing this either in a borrowed space or in front of my storage unit, either way I'd like to verify it's not the wires before I go out and buy another alternator.
If you have a battery charger I would suggest charging the battery back up to fully charged. It should be 12.5 volts or higher.

Does the battery voltage go up if you rev the engine to 2500 rpm?
ptprice likes this.
__________________
If at First You Don't Succeed - Try, Try Again
Reply With Quote
  #7 (permalink)  
Old 22 Jul 2018, 01:11 pm
Fresh Cruiser
 
Join Date: Apr 2016
Posts: 10
Default Re: Battery Charging problems.

Quote:
Originally Posted by pt06 View Post
Keep in mind that the alternator field circuit must be working in order for current to be produced. I don't have a wiring diagram to help you.

The alternator comes out through the wheel well. The manual says to remove the axle shaft.
Yes, I know. I'm trying to see if there's a way to verify that the actual wire connected to the positive post on the alternator is still good without removing the whole thing. Since I don't have a garage or driveway I can't pull out the alternator and take it in to be tested. If I'm going to pull it out I'm going to replace it, but I don't want to spend the money on another alternator if the current one is fine and it's just the wire has gone bad.
Reply With Quote
  #8 (permalink)  
Old 22 Jul 2018, 01:47 pm
Fresh Cruiser
 
Join Date: Apr 2016
Posts: 10
Default Re: Battery Charging problems.

Quote:
Originally Posted by ptcruisersteve View Post
If you have a battery charger I would suggest charging the battery back up to fully charged. It should be 12.5 volts or higher.

Does the battery voltage go up if you rev the engine to 2500 rpm?
No it doesn't. It's not charging at all. I'm just trying to find an easy way to verify that it's really the alternator and not the wires that have gone bad.
Reply With Quote
  #9 (permalink)  
Old 22 Jul 2018, 01:49 pm
Obsessed Cruiser
 
Join Date: Aug 2014
Location: Thousand Oaks, CA
Posts: 7,475
Default Re: Battery Charging problems.

Quote:
Originally Posted by nebular View Post
Yes, I know. I'm trying to see if there's a way to verify that the actual wire connected to the positive post on the alternator is still good without removing the whole thing. Since I don't have a garage or driveway I can't pull out the alternator and take it in to be tested. If I'm going to pull it out I'm going to replace it, but I don't want to spend the money on another alternator if the current one is fine and it's just the wire has gone bad.
Don't forget to check the continuity of the field wire going to the generator(alternator).

Is your engine light on? If so can you post the codes?
__________________
If at First You Don't Succeed - Try, Try Again
Reply With Quote
  #10 (permalink)  
Old 22 Jul 2018, 09:03 pm
rob302's Avatar
Veteran Cruiser
 
Join Date: Jul 2016
Location: Darien, IL | Forest Park, IL
Posts: 3,558
Default Re: Battery Charging problems.

If you ground the dark green wire in Steve's diagram and it charges, you need a computer instead of an alternator. You can access it up top at the PCM. only mentioning it as it's kinda common and it's easier to reach.

Or..

There's two belts in the car. Is the alternator belt still on the car?
__________________
.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery not charging, out of ideas chaoscow General PT Cruiser Discussions 20 06 Feb 2016 06:43 pm
PLEASE NEED HELP DESPERATELY! BATTERY CHARGING ISSUES Gavin General PT Cruiser Discussions 6 08 Nov 2013 02:27 am
PLEASE NEED HELP DESPERATELY! BATTERY CHARGING ISSUES Gavin Welcome New PT Cruiser Members 6 08 Oct 2013 02:08 pm
Seconday Battery, Charging issue, Amp, Sub Busa_Powered Sound and Security Forum 20 12 Sep 2012 03:01 pm
Charging system battery voltage DJmart Tech & Performance Forum 19 14 Sep 2011 11:26 pm


All times are GMT -5. The time now is 07:28 am.




Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.6.0 PL2 © 2011, Crawlability, Inc.
vB.Sponsors