I've owned my 1981 R100RT for 22 years. A few days ago, several electrical things failed. 1) no turn signals, 2) no brake light (but running lite OK, 3) No horn, 4) dash voltmeter doesn't work. As far as my analysis of the circuit diagram in Clymers for my bike, it appears that all of these items are connected through a single fuse. Unfortunately I can not find the two fuses (fuse block) as described in the book or by a friend who is sure the fuses are in a block under the air pump tube. I do not have a fuse block there or anywhere under the tank or near the battery. Any suggestions? Do you agree that it could be a fuse? Thanks rtrenndowski@verizon.net
-
Welcome! You are currently logged out of the forum. Some forum content will be hidden from you if you remain logged out. If you want to view all content, please LOG IN!If you are not an MOA member, why not take the time to join the club, so you can enjoy posting on the forum, the BMW Owners News magazine, and all of the benefits of membership? If you click here, you have the opportunity to take us for a test ride at our expense. Enter the code 'FORUM25' in the activation code box to try the first year of the MOA on us!
81 R100RT Fuse Location
- Thread starter 88147
- Start date
All those failures do point to one of the fuses. For these models, the fuses are located on a terminal board inside the headlight shell. For the RT, that means you'll need to go through the process of removing the lens in front and gaining access to the cover that is over the headlight shell. It's a bit of a pain, but since the fairing is not that easily removed (I think), you'll need to go through the fairing. Looks like it's fuse 15 likely at the top of the terminal board.
Snowbum discusses getting at the fuses on a '77 R100RS at the top of this page:
bmwmotorcycletech.info
Snowbum discusses getting at the fuses on a '77 R100RS at the top of this page:
access, adjusting, headlight bucket, cleaning reflector and glass, BMW RS & RT models, tunnel, light shaft, molded glass, wiring, fuses,
accessing the headlight bucket on RS and RT BMW Airhead motorcycles, aiming and cleaning and adjusting the headlight
Last edited:
stevenrankin
Well-known member
On the outside trim ring surrounding the fairing glass cover at each of the four corners are hidden Phillips screws. You have to gently lift the trim to find them. Loosen them, don't remove them completely just loose enough to pop out of the bracket, and the headlight cover will come off. Once that is off, there is a Phillips screw at the bottom of the headlight reflector chrome trim. Loosen that and the reflector and lens will pop out. The reflector snaps loosely into place at the top of the housing when everything is lined up to put it back together.
The fuses are 8 amp European style and depending upon the wiring in the headlight housing can be fiddly to get to. A pair of needle nose or forceps will work if you have fat fingers.
The bad news is the fuses are almost impossible these days to find at auto parts stores. I found them on Amazon for the best price and Busman is a very good quality company.
Now is the time to start looking for reasons why you blew the fuse. LOL, I don't mean a complete tear down of your electrical system, but a check of wiring you can see to make sure nothing is worn out and shorting. Good luck, St.
The fuses are 8 amp European style and depending upon the wiring in the headlight housing can be fiddly to get to. A pair of needle nose or forceps will work if you have fat fingers.
The bad news is the fuses are almost impossible these days to find at auto parts stores. I found them on Amazon for the best price and Busman is a very good quality company.
Now is the time to start looking for reasons why you blew the fuse. LOL, I don't mean a complete tear down of your electrical system, but a check of wiring you can see to make sure nothing is worn out and shorting. Good luck, St.
