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parasitic loss


Missouri Bob

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My buddy's 2008 R1200R shows a constant .08 A (80 mA) draw when everything is switched off. My 2008 R1200GS shows .002 A under the same conditions. Neither bike has any aftermarket electrical accessories.

 

Any idea what could be causing the R1200R's parasitic loss?

 

Thanks.

 

Bob

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Morning Bob

 

Did you wait long enough after key-off to be sure the accessory sockets are shut down?

 

Usual cause of high patristic drain is an alarm system (does his bike have an alarm system?)

 

Has anybody re-wired one of his accessory sockets to battery direct? If so look inside the socket for signs of green oxidation. A little dampness (from bike washing) on that green stuff can lead to a measurable parasitic drain across that socket.

 

You might try-- disconnect the battery cable, then hook meter across the removed cable & battery post, then use a jumper wire to bridge the cable to battery, then wait about 10 minutes & remove the jumper wire (then see what the mA draw is).

 

Any added accessories to that bike?

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Yes, he did wait until everything had powered down. No direct connection between the accessory outlet and the battery. No alarm or other electrical additions to the bike.

 

He has not tried your jumper test, yet.

 

Thanks.

 

Bob

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Yes, he did wait until everything had powered down. No direct connection between the accessory outlet and the battery. No alarm or other electrical additions to the bike.

 

He has not tried your jumper test, yet.

 

 

Morning Bib

 

I have a BMW service bulletin that is pretty specific on how to measure the patristic draw on the BMW 1200 (hexhead) motorcycles.

 

They say, first, that the battery must have a full charge so the thing powers down correctly. Next, to wait until the hazard flasher switch light goes out (early bikes). Later 1200 bikes don't have a hazard flasher switch, or light, so wait at least 60 seconds before doing any measuring.

 

Then, connect a jumper wire between the (-) battery post & the CONNECTED (-) battery cable.

 

Then, with the jumper wire STILL connected between the (-) battery post & (-) cable unbolt & disconnect the (-) battery cable (jumper wire still across the cable to battery post).

 

Then, hook meter across the (-) battery post to (-) cable (jumper wire still in place).

 

Then remove jumper wire & take the reading.

 

On the 1200 ®__(pre 2006 bike) the max is 2.5mA key-off & 3.8 mA key in R position. ON later than 2006 1200® bikes the dash keep alive wire was discontinued so the max is 2.5mA key-off & same 2.6mA with key in R position.

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