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Hi Group :wave :wave

Last Friday evening , my wife an I were headed out to the Yankee Beemers Heath rally
on our initial trip towing a trailer,an OLD borrowed "Time Out ' from a friend

All went well on my first few test rides maybe 20 miles total
Handling Ok Brakes adequate , lights worked fine

The Meltdown
100 miles from home , just over the Connecticut river
I smell something bad , slow down and find my lap is smoking !
Shut it off ,Headlite is still burning , oh oh !
Unplug the trailer , connector is warm
Disconnect the battery , to keep it from turning into a burning rig of fire

The Cause
So ,,, Long story short ... after getting it home
It must have been a short in the trailer wiring
My wiring job went directly off of a taillight, and I DIDN"T use an isolator ( Duh ).

OBSERVATIONS
Bike has power when ign sw is on ( dash lights look ok)
but Starter now doesn't spin

Headlite is OK now
Stoplights don't work , fuse is blown ,
and blows another fuse immediately when brakes are applied.
No Taillights ...I don't see a taillight fuse anywhere ?
Is that buried under the tank somewhere ?

The Questions...>
SO ...?

Does it look like I'm in for a Whole Harness replacement? or partial ...
How can I test ?, everything looks wrapped pretty tightly .
I see a few harnesses on eBay for not unreasonable prices, < 200$
Do you know what years will work ?
Up To 2001 has been suggested the fellow below selling a harness
Agreed ?

Has anyone attempted a fix like this ?
What am I in for ? A week of eating Spaghetti?
Leftover connections ? A TOTALLY stripped bike ?

Also slightly worried that my ECM may have gotten fried too ? Relays?
How can I test ?

The Gratuities
Thanks for any help you Electrical Wizards can give me .
My bike is a 1999 Custom w 90k miles , audio electronics already removed
( Jensen Solution applied )

I Can't say enough about AJ's BMW in Gill Mass
I'll relate that story of charity and human kindness in another post


Thanks Oldwingratbike
Holbrook Mass

The Replacement
Here is an eBay listing from Motographix in Alabama
Exact year and model as mine for 200 $

BMW K1200LT Custom Complete Chassis Wiring Wire Harness

OEM wire harness removed from a 1999 K1200LT Custom with heated seats, cruise, radio, etc. OEM p/n 61 11 2 305 963 fits all K1200LT models up to 01/2001. Excellent condition on this wiring harness. Only 18,000 miles on bike when it was carefully removed. All the ends and connectors are in great shape. Nothing cut or damaged to remove it from the bike.

This unit would cost over $2,000 new from the dealer. Check your part number and prices. This is a lot cheaper than retail even from your favorite discount dealer. Buy guaranteed good, used parts here for less!
 

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Wrencher Extraordinaire
2005 K1200LT
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Worked on a similar incident. This was a stuck starter relay (starter was still running) while the guy rode it until the battery died. On installation of the new battery starter ran, he got that stopped but it was like the key was on all the time until he disconnected the battery.

On tear down we discovered melted wiring stuck together from the relay box almost back to the starter. Stripped back the harness covering and separated the melted wires. taped everything back up and she was just fine.

Yours may be worth a shot. F2 is the tailight fuse.
 
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My harness caught fire in the headlight fairing due to the heated grip wire shorting out due to chafing in Dec. 2010
as I was on my move out west. fried a whole lot including gage cluster and both handlebar electrical boxes. I got a lot of replacement parts at LKQ on ebay out of Texas, also a fellow Lt owner had a whole ,main harness. It was expensive! Havn't had any problems since, knlck on wood as I am working on her right now too.
 

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I got a set of these grips from Germany but havn't installed them yet. Soon. Hope they fit, boil in water till they expand some and look like they shoud do the trick. I havn't done any riding for 2 years as a result of breaking my femur at the ball in Oct 2013 hunting season. This year I am giving it the go. need tobleed the ABS and finish Hydro dipping the tupperware a Gold Burl Walnut. Pictures when I'm done.


Replacement Rubber Grips for Handlebar Heating BMW K1200RS K1200LT Until 2003 | eBay
 

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Worked on a similar incident. This was a stuck starter relay (starter was still running) while the guy rode it until the battery died. On installation of the new battery starter ran, he got that stopped but it was like the key was on all the time until he disconnected the battery.

On tear down we discovered melted wiring stuck together from the relay box almost back to the starter. Stripped back the harness covering and separated the melted wires. taped everything back up and she was just fine.

Yours may be worth a shot. F2 is the tailight fuse.
I'm with John. You likely have one or two melted and shorted wires. The hard part is finding them. The good news (OK, I am reaching here) is that you would have to pretty well strip the bike in order to replace properly a complete hare was. So, might as well start and inspect along the way. If you find a real mess not worth fixing, then you will be well on your way to what is required for full harness replacement.
 
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You might have a bad rear lights sub-harness failure. Meaning the harness the trailer lights were connected to.

I had a very similar experience as you back in 2012 on my 2002 LT. Had a few miles of test riding solo, a few miles test with a load in the trailer, then headed for Pennsylvania a few days later. I didn't make it to PA...on the bike. Had the exact symptoms you describe.....hot trailer connector, smoke coming up from under the seat, and a melted or shorted battery. My insurance company totaled the bike and I got another one. Kept the 2002 for parts but ended up selling to a fellow that was looking for a motorcycle project. He found a full harness online somewhere for $200 or so, then took LOTS of pictures as he meticulously disassemble the bike and put in the new harness. The bike now runs flawlessly, but I know he put many hours into it over the course of a couple winters.
 

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It was definitly a combination for me of electric grips and maybe the trailer wiring had something to do with it. They were chaffed and shorted which may or may not have made the trailer a problem. I had been on several trips and not had problems with the trailer and the previous owner did a 12,000 mile trip with it too. You will KNOW your LT better than most riders if you need to replace the main harness, sub harness for speakers, rear harness, etc. I have intimate knowledge now of the entire bike between the ABS brakes, clutch/oil seal, Final Drive, Fork seals, front shock/ damper, cruise control, radio, alarm system, charcoal canister and both handlebar grip electrical assemblies, boy are they fun! My hat goes off to all who have helped me keep my LT running these past 11 years. My sympathies to mechaninc everywhere that have to learn these bike without the help on here. They are a different beast altogether! I'll never get another bike so this is the only one I'll have and it needs to keep on running. I did get to sit on a new 1600 last January but have not riden one as yet as I know I can' afford one, lucky I got the LT! You people are great. I wish I had been active on the website last years as I just now found out the CCR was only 60 miles down the road in CDA! I never went on all last year, not once, now THAT was dumb! I am in the process of dipping all the plastic dash assemblies and trying to make them look different. Burl walnut is the medium but it's not as easy as the video's make it look, a damn site harder than that! Hopefully this weekend I will finish the pieces I need and get it all done. I did 3 so far that almost are as good as I want them all to be. Not yet clearcoated in the pictures. The stingray, speaker grill and dome up front remain and are very difficult to do.
 

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Oooohhhhh, I really like the wood accents. Can't wait to see the finished product. Looks like a good winter project.
 

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.....I am in the process of dipping all the plastic dash assemblies and trying to make them look different. Burl walnut is the medium but it's not as easy as the video's make it look, a damn site harder than that! Hopefully this weekend I will finish the pieces I need and get it all done. I did 3 so far that almost are as good as I want them all to be. Not yet clearcoated in the pictures. The stingray, speaker grill and dome up front remain and are very difficult to do.
You need to start a new thread were you post updates and pictures to your progress on this....:wink:
 
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