Trouble starting and battery light on in dash - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 08-10-2011, 01:47 PM
n00b
 
Join Date: Jan 2011
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
dzuvia9 is on a distinguished road
(Thread Starter)
Trouble starting and battery light on in dash

1990 525i

I just had a new head unit installed and I was curious if that could be causing the batter/electrical problems.

Whenever I do eventually get the car to start, the radio will turn on and when I put anymore of a load on the system, like lowering the windows, or lights, or defrost, the head unit will turn off and it seems like the car is going to give out.

The lights seemed extremely dim the other night and even the check battery light seemed to fade in and out with my decelerations and accelerations.

Before the new head unit, the battery did have problems going flat occasionally, put it almost always started and never had electrical problems.

Alternator? Voltage regulator?
dzuvia9 is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 08-10-2011, 03:00 PM
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Posts: 2,194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jack Dabsy will become famous soon enough
Garage
Like you said, alternator ! Or maybe a mickey-mouse ground/earth issue !!


Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline  
#3 (permalink) Old 08-12-2011, 11:49 AM
n00b
 
Join Date: Jan 2011
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
dzuvia9 is on a distinguished road
(Thread Starter)
Well, I had both the alternator and the battery checked. They are both good.

So, Dabsy, our only other option is a mickey-mouse ground/earth issue!!!

Or, maybe a voltage regulator? Not sure, leaning toward mickey-mouse.
dzuvia9 is offline  
#4 (permalink) Old 08-12-2011, 02:58 PM
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Posts: 2,194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jack Dabsy will become famous soon enough
Garage
Generally speaking, the alternator deals with "regulation" ...
I would firstly, check the head-unit installation and work back from there (Cautiously avoiding Minnie Mouse)!
Maybe put an ammeter on the battery and test it with and without the key in (on acc)...
HTH


Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline  
#5 (permalink) Old 08-12-2011, 06:48 PM
n00b
 
Join Date: Jan 2011
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
dzuvia9 is on a distinguished road
(Thread Starter)
The HU install was a complete re wire. My BMW did not have the option for a harness install for the radio. We decided to completely avoid the common ground setup (and Goofy while we were at it) and just wired all the speakers to the HU directly. The guy even took out the old factory amp.

All the connections were soldered and were well done.

Looks like I am going to have to go diggin'
dzuvia9 is offline  
#6 (permalink) Old 08-13-2011, 05:30 AM
n00b
 
Join Date: Aug 2011
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
njtl001 is on a distinguished road
Quote:
Originally Posted by Dabsy View Post
Generally speaking, the alternator deals with "regulation" ...
I would firstly, check the head-unit installation and work back from there (Cautiously avoiding Minnie Mouse)!
Maybe put an ammeter on the battery and test it with and without the key in (on acc)...
HTH
You are so interesting,

To be happy! That cutting blade & Circular Blades
njtl001 is offline  
#7 (permalink) Old 08-13-2011, 07:53 AM
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Posts: 2,194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jack Dabsy will become famous soon enough
Garage
Thank you !!


Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline  
#8 (permalink) Old 08-19-2011, 05:50 PM
n00b
 
Join Date: Jan 2011
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
dzuvia9 is on a distinguished road
(Thread Starter)
So I put in the new voltage regulator, the car only seems to be running worse. The radio starts to short out more and the car itself seems like it is giving out, only to suddenly jerk back.
dzuvia9 is offline  
#9 (permalink) Old 08-20-2011, 12:02 PM
Captain... Savvy ?
 
Jack Dabsy's Avatar
 
Join Date: Apr 2011
Location: Barnsley UK
Posts: 2,194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Jack Dabsy will become famous soon enough
Garage
Deffo a BAD connection mate... Looking like it's throwing the new reg out too !!


Eso es todo!
Please press the "REP" button if you are happy with your response/answer...

Please JOIN, or just have a look... Its Totally FREE...
BMW Part Market

BMW Online Manuals (TIS)

New Member ?
Jack Dabsy is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 5-Series (E12,E28, E34, E39, E60)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
starting trouble tim96 3-Series (E21, E30) 24 04-03-2010 06:37 AM
Starting trouble tim96 3-Series (E21, E30) 4 09-04-2009 06:41 PM
Some trouble starting. e30dream 3-Series (E21, E30) 7 01-11-2007 10:13 PM
Trouble Starting Old_School_Bimmer 3-Series (E21, E30) 4 07-29-2004 04:40 PM
Battery Light on dash cluster?? LuvDaBimma's 3-Series (E36) 1 06-24-2004 12:51 PM

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

 
For the best viewing experience please update your browser to Google Chrome