Electrical short: advice on troubleshooting - BMW Luxury Touring Community
 
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post #1 of 5 Old Apr 10th, 2014, 12:24 pm Thread Starter
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Electrical short: advice on troubleshooting

Hello all,

My 2001 LT has an unusual electrical problem. Battery drains dead after 2 days. Radio will not turn off, so I disconnected it in the stingray. No more sound but the short is still there. Still drains the battery.

Going to take the tupperware off this weekend to see if I can find the short.

Never had to find short before. My plan:
Use amp meter to try to find where voltage is leaking. Seems like a significant drop so should not be hard to measure. I have clymer manual for wiring diagram.

Any advice or things to watch out for?

Thank you.
Mike

1995 K1100 LT Sold after 135,000 great miles
2001 K1200LT
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post #2 of 5 Old Apr 10th, 2014, 12:47 pm
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Re: Electrical short: advice on troubleshooting

Get yourself a meter which will measure amperes. They are 20 bucks or less at harbor freight. Then just pull your fuses and measure the amps across the terminals of each fuse slot. This will identify the problem circuit. The only draw with the key off is the computer memory and it'll measure no more than .03. It's usually .01 or .02.

With that said, you may already know where the problem is since the radio won't shut down. I would suspect a stuck relay or water damage in the radio.


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post #3 of 5 Old Apr 10th, 2014, 2:24 pm
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Re: Electrical short: advice on troubleshooting

One thing you might try is a hard reset of the radio. Just undo the negative terminal on the battery for 20 minutes then hook it back up. If the radio is off then it is time to use that ammeter between the negative post and the lead. Like Dean said it should be on the order of a few milliamps, if it is 0.1 amps or greater it is time to start tracking down the item pulling the extra current.

John
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post #4 of 5 Old Apr 10th, 2014, 4:35 pm Thread Starter
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Re: Electrical short: advice on troubleshooting

Thanks Guys!

I'll start the curcuit check on Saturday.

1995 K1100 LT Sold after 135,000 great miles
2001 K1200LT
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post #5 of 5 Old Apr 10th, 2014, 7:47 pm
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Re: Electrical short: advice on troubleshooting

I guess this problem is new so probably not this issue .....
The early radios had some battery drain issues due to a mismatch of
software between the controller and radio.
Attached a quick test to validate to software.
HTH
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