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post #1 of 6 Old Oct 19th, 2007, 12:25 am Thread Starter
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Installed my new battery tonight, and when I connected the neg terminal was surprised at the size of the spark created at the time of contact. Other bikes I've had barely made a spark when contact is made because there wasn't much current being drawn when bike was off. Everything is ok, but as I took a half hour charging ride, I was wondering...

What is the current draw when bike is parked, steering not locked, but no acc on, just the clock etc.?

What else draws when the bike is parked, presumably "off".

I read on this forum about locking the steering when parked so everything is off. Was this just telling us that locking the steering makes sure radio etc is off, or are there other things drawing current that go off when the steering is locked?

Nothing urgent to these questions, but just curious.

Steve
Chandler, AZ
2000 BMW 1200LT


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post #2 of 6 Old Oct 19th, 2007, 10:22 am
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Thumbs up Parasitic Current Draw

There is a significant parasitic current draw on the LT even in the "Locked" ignition key position. The electronics such as the alarm system and other functions draw power to be operative while "Locked".

If you leave your bike parked without a battery tender for a week or so you might find you're unable to start the bike.

I've never put an ammeter on bike to measure the draw.

Tom

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post #3 of 6 Old Oct 19th, 2007, 5:39 pm
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Quote:
Originally Posted by Tom_Becker
There is a significant parasitic current draw on the LT even in the "Locked" ignition key position. The electronics such as the alarm system and other functions draw power to be operative while "Locked".

If you leave your bike parked without a battery tender for a week or so you might find you're unable to start the bike.

I've never put an ammeter on bike to measure the draw.

Tom
When I park ole Toad in the garage and don't put the Battery Tender to work, then the draw displayed on the i4c volt meter reads, as an example - 12.47 yesterday and today it read 12.46. Pretty constant daily draw down over the last several years, using an Odyssey PC680 battery. Parasitic load includes the clock; the Motronic; the i4c unit display on the dash; ?the radio pre-sets? - not sure about that tho. No alarm.
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post #4 of 6 Old Oct 19th, 2007, 6:25 pm Thread Starter
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On a previous post about battery charging, someone pointed out to me that when replacing the battery I should do something to reset the motronic when the new battery is in. I went back through and darned if I could find that recommendation. Seems like it involved turning the throttle to the stop, with engine off but key on. Does that sound right??

Dick, I also bought the Odysey 680. Have you had good luck with them? If I read that manual correctly, looks like it can handle being charged on a regular automotive charger, or did I miss something??

Steve
Chandler, AZ
2000 BMW 1200LT


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post #5 of 6 Old Oct 19th, 2007, 6:29 pm
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Quote:
Originally Posted by azredline
----------------------------Dick, I also bought the Odysey 680. Have you had good luck with them? If I read that manual correctly, looks like it can handle being charged on a regular automotive charger, or did I miss something??
The Odyssey is a GREAT battery. And yes, the AGM type batteries can be charged with standard automotive lead/acid chargers, no special voltage profile needed like the Gel Cell types.

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post #6 of 6 Old Oct 19th, 2007, 6:40 pm
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Quote:
Originally Posted by azredline
On a previous post about battery charging, someone pointed out to me that when replacing the battery I should do something to reset the motronic when the new battery is in. I went back through and darned if I could find that recommendation. Seems like it involved turning the throttle to the stop, with engine off but key on. Does that sound right??
To reset the TPS (Throttle Positioning Sensor, and not TPS as in Office Space TPS reports... LOL) you turn the ignition ON but do not start the engine. Roll the throttle fully open and release, repeat once more. Turn the ignition OFF. Turn ignition ON and this time start the engine! Et voila!

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