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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 07-10-2008, 09:51 AM   #1
fly325
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car wont start after two days of not driving it

i tired to start my car today after two days of not driving it and it would not start.

all the interior lights, lights on the dash, and head lights would flicker and I'd hear a clicking sound but to no avail.

I now cant find my manual to see what all the icons on the obc means

nothing was altered in my car.
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Old 07-10-2008, 09:55 AM   #2
howie
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battery dead...maybe resulting from bad atlernator.

search: http://forum.e46fanatics.com/showthread.php?t=587194

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Old 07-10-2008, 10:01 AM   #3
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fully charge the battery, load test alternator, if amperage and voltage is good, check for a parasitic draw, if this is hard to do for you remove the blower motor fuse and see if the draw goes away, I have seen plenty blower motor resistors cause parasitic draws.
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Old 07-10-2008, 10:04 AM   #4
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Originally Posted by silverslider View Post
fully charge the battery, load test alternator, if amperage and voltage is good, check for a parasitic draw, if this is hard to do for you remove the blower motor fuse and see if the draw goes away, I have seen plenty blower motor resistors cause parasitic draws.

draws can be found by using a voltmeter and pulling fuses too. if you pull one and the draw goes away, thats where the draw is. in my old car (read willing to do silly stuff with) i just connected a switch that would turn off my draw when i left the car.
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Old 07-10-2008, 10:08 AM   #5
silverslider
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Keep in mind, if you are performing a draw test you HAVE to keep constant current flowing, completely disconnecting power will awake modules wich will blow the 10a fuse on your meter, easiest way to achieve this is to find a good grounding point for your meter, connect the other terminal to the - batt. terminal, and unbolt the chassis ground to battery.

It is very important to let the car sit for a few allowing it to go to sleep before you try this, also triggering the trunk latch so the car goes to sleep faster.

Anything above 45 milliamps is not normal in dormant state.

Last edited by silverslider; 07-10-2008 at 10:11 AM.
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Old 07-10-2008, 10:18 AM   #6
fly325
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thanks for the information. i actually had to look for the battery. i never had to work on the car since i got it in 2003 and the warranty just ended last year. it currently has about 48000 miles with 100 miles to go for an oil change which would be scheduled for this week.
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