Battery/starter issue - BMW Luxury Touring Community
 
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post #1 of 12 Old Apr 24th, 2014, 8:28 am Thread Starter
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Battery/starter issue

So I got the LT out yesterday, first time this year. Rode to work, everything good. Went to the gym at lunch, came back to the bike and battery was dead. Realized I had left the running lights on. Tried to bump it across the slight downhill in the parking lot, no luck. Called GF to rescue me, pulled battery, took it home to charge. Went back last night, late. Put the battery in, hooked up + side, went to hook up - side, sparks flew and the starter started spinning. What the ?? What did I do wrong? Battery backwards maybe? That would explain the sparks, but why would the starter spin? No key, kill switch off. Pretty sure I had the battery right, but again it was late, holding flashlight while doing this. Going back to it today, hopefully it doesn't get towed.

Bruce Northrop

'99 BMW K1200 LT
'99 Triumph Sprint ST
'72 Norton 750 (resto in progress)
'69 Triumph TR6C (restored)
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post #2 of 12 Old Apr 24th, 2014, 9:09 am
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Re: Battery/starter issue

You may have welded the contacts on your starter relay.

BMW upgraded the starter relays with an electronic version sometime during the model year 2001, you are riding a 99 LT right?

Currently riding a 2003 K1200LTC
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post #3 of 12 Old Apr 24th, 2014, 9:19 am Thread Starter
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Re: Battery/starter issue

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Originally Posted by timgray View Post
You may have welded the contacts on your starter relay.

BMW upgraded the starter relays with an electronic version sometime during the model year 2001, you are riding a 99 LT right?
Ouch, that doesn't sound good. Yup, 99 with about 45k miles. How would I know if this is the problem? And how do the contacts get welded?

Bruce Northrop

'99 BMW K1200 LT
'99 Triumph Sprint ST
'72 Norton 750 (resto in progress)
'69 Triumph TR6C (restored)
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post #4 of 12 Old Apr 24th, 2014, 9:28 am Thread Starter
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Re: Battery/starter issue

Ahh, a quick search tells me more than I need to know about this. Hmm, work today, got a flight to Vegas in the morning and a dead bike in a parking lot. Going to be an interesting day.

Bruce Northrop

'99 BMW K1200 LT
'99 Triumph Sprint ST
'72 Norton 750 (resto in progress)
'69 Triumph TR6C (restored)
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post #5 of 12 Old Apr 24th, 2014, 10:32 am
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Re: Battery/starter issue

The starter motor lead goes to a tie point right to the rear of battery, disconnect there hook up battery, with bike on stand in neutral seat up touch wire to tie point motor starts set wire aside safely ride home
That is the lead I used to activate a Ford solenoid to start bike, take load off starter relay which you may have to replace

Gary
2018 R1200RT
Past rides
2012 K1600GTL
2000 K1200LT
1992 K1100LT
2000 V Star 650/Velorex sidecar
1985 K100RT
1965 R60/2
1960 AJS 500 single
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post #6 of 12 Old Apr 24th, 2014, 11:21 am Thread Starter
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Re: Battery/starter issue

Ok, that was easy. I hooked up the + side first. Then I just held the - side to the battery post and hit the starter button a couple times and it started up, seems to be ok. I'll probably ride it as is for now and replace the relay at a later time unless it becomes a problem.

Bruce Northrop

'99 BMW K1200 LT
'99 Triumph Sprint ST
'72 Norton 750 (resto in progress)
'69 Triumph TR6C (restored)
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post #7 of 12 Old Apr 24th, 2014, 12:17 pm
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Re: Battery/starter issue

Do not continue to ride it as is. Once the contacts have welded, they will do it again with the potential for huge damage such as a melted wiring harness. You are riding a time bomb. Fix it with a ford starter relay or upgrade it to the newer OE part.


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post #8 of 12 Old Apr 24th, 2014, 12:48 pm
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Re: Battery/starter issue

QUOTE=deanwoolsey;923337]Do not continue to ride it as is. Once the contacts have welded, they will do it again with the potential for huge damage such as a melted wiring harness. You are riding a time bomb. Fix it with a ford starter relay or upgrade it to the newer OE part.[/QUOTE]

+1 pushing your luck if you continue as is

Gary
2018 R1200RT
Past rides
2012 K1600GTL
2000 K1200LT
1992 K1100LT
2000 V Star 650/Velorex sidecar
1985 K100RT
1965 R60/2
1960 AJS 500 single
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post #9 of 12 Old Apr 24th, 2014, 1:15 pm
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Re: Battery/starter issue

I've owned my 2000 LT for two weeks and have been a sponge absorbing the LT wisdom posted on this forum. I would like to avoid a welded relay when my two year old battery requires replacement. Was it incorrect to connect the positive battery lead before the negative?
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post #10 of 12 Old Apr 24th, 2014, 1:38 pm
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Re: Battery/starter issue

Quote:
Originally Posted by Fun Bobby View Post
I've owned my 2000 LT for two weeks and have been a sponge absorbing the LT wisdom posted on this forum. I would like to avoid a welded relay when my two year old battery requires replacement. Was it incorrect to connect the positive battery lead before the negative?
Always, allways connect the positive before the negative.

Disconnect is reverse of above, disconnect negative first.

Reason why; if whatever vehicle you have the frame is usually ground (technically the lt isnt) and if you hit the frame with whatever wrench you are using...it might weld itself to the frame, lots of sparks at the least.

John Baker

2005 BMW K1200LT
1979 Suzuki GS1000E
1978 Honda CB350
1975 Suzuki GT380
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post #11 of 12 Old Apr 24th, 2014, 2:08 pm
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Re: Battery/starter issue

Quote:
Originally Posted by Fun Bobby View Post
I've owned my 2000 LT for two weeks and have been a sponge absorbing the LT wisdom posted on this forum. I would like to avoid a welded relay when my two year old battery requires replacement. Was it incorrect to connect the positive battery lead before the negative?
http://www.bmwlt.com/forums/showthread.php?t=66405

Interesting thread, I posted links to pics of what I first did, water going through the seat damaged first solenoid so second has been mounted right side under passenger seat fastened with a small bracket to side case mounting frame point

The existing starter relay triggers the Ford solenoid

Gary
2018 R1200RT
Past rides
2012 K1600GTL
2000 K1200LT
1992 K1100LT
2000 V Star 650/Velorex sidecar
1985 K100RT
1965 R60/2
1960 AJS 500 single
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post #12 of 12 Old Apr 24th, 2014, 2:21 pm
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Re: Battery/starter issue

Thanks for the electrical guidance John. Back to lurking mode.

Rob
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