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Discussion Starter · #1 ·
When I crank my car after it's been sitting for a few hours it acts like the battery has been disconnected: the time has to be rest and the brake lamp failure/fuel supply malfunction/trailer lamp malfunction light comes on. If I drive for a while the warning goes away. I've been having some problems with the battery charging as I've been spending most of my time on a military base where the speed limit is 35 mph. I found that this problem went away for the most part after I made a long road trip and the battery charged for an extended period of time. It came back after a few days. Could this be related to the battery somehow?
 

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It's your driving habits. The car doesn't charge the battery under 2k rpms or somewhere around that range.

35mph is too slow to get rpms up higher than 2k.

Invest in a battery tender.
 

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Discussion Starter · #3 ·
So when I go back to normal driving it will probably fix itself?
 

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Yes and no. If the battery has been discharged for a while, and it's a lead acid, the plates inside are most likely sulfated, decreasing battery performance/life.

Once you start driving normally, take the battery out and have someone charge it. If you can use a tender that would be best because it can repair the battery but it will take a couple days.

If you're still having issues after charging, replace the battery.

Alternators are never suppose to fully re-charge a heavily depleted battery. For starters it would take way too long. Secondly, you're straining the electrical system.
 

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Discussion Starter · #5 ·
The service engine soon light came on this morning could that be related to this issue?
 

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The service engine soon light came on this morning could that be related to this issue?
Yeah, could be. CODE CHECK - any BMW Indy should have that or GT1. Shucks, I have one - maybe you should too!

Do you qualify for the Battery Cable Recall? Otherwise, yeah, could be your battery:

http://www.youtube.com/watch?feature=player_embedded&v=m6Y5qXZTPe0

http://www.youtube.com/watch?v=KF1gijj03_0&list=PL47B21673C5B18B54

Yeppur, cold weather usually brings on a rash of "What's the snowflake icon mean?" and "Is my battery bad?" threads.

Chilly.gif

When was your battery last replaced? What, never?!? Dude! When you replace it, [click here for procedure], an inconvenient R&R in the German tradition.

BUT! If you don't want to wrestle that honkin' big box o'lead out of your trunk, consider BATTERY DESULFATING

https://youtu.be/DX1OaMYp6Kw

Many part series on battery desulfating:

https://youtu.be/ecmDgoKK-UE

Mechanic 01 [20].jpg

Couple more useful views:


__________________________________________________

EDIT: NEW device to test voltage over time under any condition - VERY useful....

http://www.youtube.com/watch?v=ZnI5Iy75aWg

.
 

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Discussion Starter · #7 ·
So I replaced the battery and it's still resetting any thoughts?
 
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