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-   -   [HELP - ELECTRICAL] tracing battery drain / ammeter usage (http://www.peachparts.com/shopforum/showthread.php?t=97499)

stevebfl 06-27-2004 07:29 PM

How bout I rough it out. Twelve milliamps over an hour is 12milliamphours. Two week (at 25 hrs a day cause I can do it in my head) equals 350 hours times 12ma/h equals 4200ma/h divided by 1000ma to an amp and you get 4.2ah. If you subtract that extra hor it probably is real close to 4.

What I don't get is how if you have all those circuits taking so many milliamps then how is the total only 12ma.

stevebfl 06-27-2004 07:34 PM

It also sounds to me that the body CAN is staying awake. You have to prepare carefully to view quiescent current after the car is asleep. How long does your dome light take to turn off, when the door is closed? Does the mileage in the instrument cluster shut off after the door shuts and the dome light is out?

autozen 06-27-2004 07:34 PM

Alex,

At the moment I can't think of anyone in The Dublin, San Ramon area. You might call A&F Importrd parts in Oakland and ask their advice.

Peter

stevebfl 06-27-2004 07:45 PM

Not that I know a shop everywhere, but just so happens that Dublin struck a memory.

I'm pasting an entry from the BMW tech group I belong to of one of the top shops in the US:

Kahler’s Werkstatt, Denny & Cindy Kahler, 6117 Dougherty Rd, Dublin, CA 94568, (925) 829-2050

Denny is nationally known for his position in the German Repair industry. Try a Google search on Denny Kahler if you want to read about an allstar in my industry.

autozen 06-27-2004 07:56 PM

Alex,

I had forgotten about Kahler's. I concur.

Peter

ctaylor738 06-27-2004 09:18 PM

I'm no expert either, but don't the seats have a memory that would need to be powered?

ard 06-27-2004 10:25 PM

Hi Steve,

I was wrong (DEAD wrong in fact) when I said 12mA. When I re-measured carefully I found ~ 200mA in total, with the breakdown of the most significant circuits as shown in my previous post. There were 1 or 2 ~10mA consumers, which I omitted.

thanks

/alex

ard 06-27-2004 10:31 PM

Hi Steve,

the dome light stays on ~ 10 - 15 sec after the door is closed.

The instrument cluster illumination stays on for ~ 30 sec?

Could you please educate me as to what CAN stands for.

Also, I will probably Kahler's. However, not to sound cheap, but I thought of a brute-force ~ $70 solution. I can get a "battery drain protector" from somebody like Griot's Garage with a lifetime warranty and that might allow me to "ignore" the problem. Good idea? Probably not, but I am willing to consider it seriously.

Thanks

/alex

speedy300Dturbo 01-09-2007 09:36 PM

Quote:

Originally Posted by stevebfl (Post 661673)
Not that I know a shop everywhere, but just so happens that Dublin struck a memory.

I'm pasting an entry from the BMW tech group I belong to of one of the top shops in the US:

Kahler’s Werkstatt, Denny & Cindy Kahler, 6117 Dougherty Rd, Dublin, CA 94568, (925) 829-2050

Denny is nationally known for his position in the German Repair industry. Try a Google search on Denny Kahler if you want to read about an allstar in my industry.

FYI, Denny Kahler has retired. The shop is under new ownership but keeps the Kahler's name. I hope the new owners and techs can maintain the level of expertise that Denny demonstrated.

dpetryk 01-09-2007 10:16 PM

The current for the seats is being consumed by a microprocessor that controls the motors. It is constantly powered up so it can remember the various programmed seat positions.

Those values sound normal.


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