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-   BMW R1100S / R1200S Tech Forum (http://forums.pelicanparts.com/bmw-r1100s-r1200s-tech-forum/)
-   -   my wiring harness FRIED. Need a brief tutorial on replacing main harness (http://forums.pelicanparts.com/bmw-r1100s-r1200s-tech-forum/1114226-my-wiring-harness-fried-need-brief-tutorial-replacing-main-harness.html)

darthpotat94 03-07-2022 04:35 PM

my wiring harness FRIED. Need a brief tutorial on replacing main harness
 
I made a post earlier about my fuel pump no priming. Well, I did some more digging and I found out my wires have melted, from the relay boxes across the wires hugging the fairing frame. It cannot be saved so I'm going to replace it with a used one.

I've been digging around the internet looking for a guide or someone who has done it and wrote his process on a forum but I couldn't find anything.

Can anyone walk through the process of replacing the harness briefly? I am particularly concerned about the airbox. I think I have to remove it to access the negative ground but do I really have to remove the driveshaft and swing the subframe up? Any advice or tips are more than welcome.

http://forums.pelicanparts.com/uploa...1646703206.jpg
http://forums.pelicanparts.com/uploa...1646703206.jpg

Groceryrun 03-09-2022 09:21 AM

The battery negative ground is attached to the top of the transmission housing.
If I can remember, it's just foward, and under, of the battery box, and under the ABS unit and Motronics unit.
No need to touch the driveshaft and swing the subframe.

908/930 03-09-2022 11:21 AM

I have no advice but would like to know how did that happen? Looks like a bunch of wires smoked.

darthpotat94 03-09-2022 11:48 AM

it shorted on the fairing frame. tight zipties.

WilyB 03-09-2022 12:44 PM

Both R1100S I saw last year on COPART were salvaged due to similar harness issues. Is this a known aging problem for the R1100S?

BadToTheBown 03-09-2022 06:09 PM

I'm installed a couple, Some mechanical disassembly will be required. The sheathing on these harnesses is crap after time. I pulled it off and wrapped in in friction tape. You'll also need to get under the battery tray...good luck...

Boxerrider 03-21-2022 09:44 PM

Ditto on this, I just went through my 2000 R1100S and spent some time removing disintegrating wiring harness covering and wrapping with electrical tape, I was surprised with how vulnerable the fuel system wiring was, I’ll definitely do more of this next winter for sure. Not surprised if more of this crops up.

Bxr

Swamper 03-22-2022 07:13 AM

Yup, wiring doesn't last forever.http://forums.pelicanparts.com/uploa...1647961972.JPG


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