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R1100S Accessory Socket

I recently made the mistake of letting the battery die on my 2005 R1100S BCR. I tried reviving it with a battery tender, to no avail. So , after reading up on the forum, I ordered a new Odyssey battery.

After insuring it was charged, I had the "bright" idea to try to jump start the bike by hooking the new battery up through the accessory socket. It turned over slowly, but I was concerned about running the battery down so I stopped.

After going through the ordeal of installing the battery (thanks for the great info on the forum- the BMW manual isn't much help!) the bike runs fine, but I now get a flashing red light on my battery tender when I hook it up through the accessory socket.

Since it works fine on my Laverda, its not the battery tender. Thinking that it might be the accessory plug lead, I bought a new one from the local BMW dealer. Still the same result.

Is the socket fused, or is there something else that I might have damaged?
Old 01-27-2010, 04:23 AM
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Yes, the socket is fused. On my '04 the fuse was in the fuse block on the left hand side of the fairing.
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Old 01-27-2010, 04:43 AM
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If the socket fuse is blown, your clock will be dead too.

The flashing red light means the charger is not connected to the battery... The female socket on the bike is located by the wheel and gets sprayed with road grime, and is prone to corrosion... The socket may need cleaned or replaced... The ground wire on mine had corroded away to nothing.
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Old 01-27-2010, 05:31 AM
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R1100S Accessory Socket

I'm suspecting the fuse. I'm pretty sure the clock is out too, but I figured I just needed to reset it following the battery change.

I'm assuming the accessory socket is not in the BMW shop manual because it was a dealer or previous owner installed item?
Old 01-27-2010, 06:37 AM
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Check inside the male plug on the battery tender for a broken or loose connection.
Old 01-27-2010, 06:47 AM
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My mistake, the BMW repair manual does indicate that the power socket is fused, along with the instrument panel and horn. Fuse position 3, in the left fuse box. A 15 amp fuse.
Old 01-27-2010, 06:50 AM
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R1100S Accessory Socket

OK, at the risk of appearing totally inept, can someone tell me how to get in to the large rectangular fuse box on the left inside of the fairing? The cover appears to be hinged on the front end, with a latch on the rear. But I'll be damned if I see how you're supposed to open it with all those tabs holding it shut.
Old 01-27-2010, 08:29 AM
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Twist the fuse box 1/4 turn and it releases from the frame... there is enough wire on the harness to pull it out so can see what you are doing.... Then you can snap the cover off.
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2010 KTM 690 ENDURO R/1969 BSA StarFire
1971 CB500 four/2005 kawasaki 1600 Nomad
Old 01-27-2010, 08:33 AM
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The fuse box is about 1.5" cube above and forward of the long box you are trying to open.
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Old 01-27-2010, 11:50 AM
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R1100S Accessory Socket

Yep, I guess I demonstrated my ineptness.

After determining I needed to get in to the smaller, fuse box (not the central electrical equipment box) I did find fuse number 3 burned out. After replacing it, everything appears to be in order.

I do find it interesting that the workshop manual shows it as a 15amp fuse, and the fuse box calls for a 10 amp, which is what was in it.

Thanks for the help. I'd be lost without the guidance here on the forum.
Old 01-27-2010, 01:09 PM
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10 Amp Fuse is correct...that thin wire to the accessory socket would be doing more than it's rated for at 15 Amps.
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Old 01-27-2010, 06:56 PM
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Quote:
Originally Posted by wswartzwel View Post
If the socket fuse is blown, your clock will be dead too.
Thank you for that tid-bit!! Explains everything.
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Old 01-30-2010, 04:17 PM
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Quote:
Originally Posted by wswartzwel View Post
Twist the fuse box 1/4 turn and it releases from the frame... there is enough wire on the harness to pull it out so can see what you are doing.... Then you can snap the cover off.
This too - I was ready to pull the tupper ware off.
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Old 01-30-2010, 04:20 PM
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Old 01-30-2010, 04:20 PM
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