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Old 02-05-2012, 01:41 PM   #1
Mane OP
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Question R100GS, fuse problem?

So the history goes like this...

Last night, after having a good time with some friends at Hooters (a mild bachelor party), I started my old BumbleBee and ride on. As I did a U-turn in front of the restaurant, some friends were still in the front door and I honked the horn and wave goodbye...

After this I notice the red battery light turned on and some minutes later it turned off. I thought to my self that the battery is weak and I might have to replace it soon.

By the time I arrived home the turn signals wouldn't work at all, as well as the idiot lights. Yes, this time not even the battery light would turn on. However the high beam is on and working fine. That is the blue light in the dashboard, as well as the actual head light.

Now in the safe of my home garage, I turned the engine off and then start it right away. The engine started strong and without hesitation. Idiots lights were off (Neutral, turn indicators and horn), but the high/low beam indicator is working fine. I though this may be a fuse issue after all.

I left the bike on the battery charger all night and planned to to do some troubleshooting in the morning.

Today, the first thing I tried was to just remove and reinsert the fuses, think some might be loose and Nope, same behavior. So I took my multimeter out and began to point each fuse. Healthy readings on all of them. Put them back at the fuse box, now thinking the worse... problems in the wiring. .

After putting back, I tried one more time and.... Everything is working fine. .

Being a noob on both fronts (Mechanics and airheads), I reach to you for advice.... Is this normal or is the a sign of something else going, such as the charging system or wiring harness problem?

Regards,
Mane
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Old 02-05-2012, 01:50 PM   #2
hardwaregrrl
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Kind of sounds like a dirty ground. They're brown on our bikes. Get a can of electrical cleaner and go through and spray ALL terminals, connect and disconnect a few times and then squirt in a bit of dielectric grease. Then go from there. Check your ground and cable coming off the battery. Could be loose and/or dirty.

For the R80 G/S, but pretty similar to your R100

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Old 02-05-2012, 02:14 PM   #3
Bill Harris
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+1 on that. A bad ground is typically the cause of unexplainably wonky lights and electrics.
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Old 02-05-2012, 05:19 PM   #4
Mane OP
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Thumb

Hey Jenna,

Thank you for the tip and that nice color diagram.

Regards,
Mane
Quote:
Originally Posted by hardwaregrrl View Post
Kind of sounds like a dirty ground. They're brown on our bikes. Get a can of electrical cleaner and go through and spray ALL terminals, connect and disconnect a few times and then squirt in a bit of dielectric grease. Then go from there. Check your ground and cable coming off the battery. Could be loose and/or dirty.

For the R80 G/S, but pretty similar to your R100

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'94 BMW R100GS Bumble Bee
'08 Triumph Tiger 1050 (Sold it, solid performer)
'06 KTM 640 Adventure (Sold it and regret it since day one)
'03 BMW R1150GS Adventure (Death because of hopistalary infection R.I.P.)
"Never wrestle with a pig. You both get all dirty, and the pig likes it".
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Old 02-05-2012, 07:17 PM   #5
H96669
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Convenient having some parts in the house, I can reach under my desk and take a pic.

Hey...look under the triple tree where the harness runs, some of them have a tendency to break there. This one is OK but the casing is not, I caught it on time before breaking any wires.

My whole harness needs some attention, some corroded connectors,relays and dried out stiff wires....them old bumblebees do need some attention after all them years.

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Old 02-06-2012, 12:30 AM   #6
squish
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After checking and cleaning all the connections

Look toward your relays,

I had funky issues with idiot lights, headlight and a full (Tested full both underload and static) battery.

Replace the three main relays and the issues went away.
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Old 02-06-2012, 06:27 AM   #7
97oilhead
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Quote:
Originally Posted by H96669 View Post
Convenient having some parts in the house, I can reach under my desk and take a pic.

Hey...look under the triple tree where the harness runs, some of them have a tendency to break there. This one is OK but the casing is not, I caught it on time before breaking any wires.

My whole harness needs some attention, some corroded connectors,relays and dried out stiff wires....them old bumblebees do need some attention after all them years.

If everything was working OK before a tight U-turn I would suspect a possible pinched\broken wire in the harness as well.
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Old 02-06-2012, 09:31 AM   #8
hardwaregrrl
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Wait wait wait....there's a Hooters in Guatemala?!
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Old 02-06-2012, 10:11 AM   #9
Mane OP
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hahahaha... yes there's a hooters in Guatemala, but more important is that a Guatemalan girl became Miss Hooters World on 2007. See, we also have the goods...



Regards,
Mane
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'94 BMW R100GS Bumble Bee
'08 Triumph Tiger 1050 (Sold it, solid performer)
'06 KTM 640 Adventure (Sold it and regret it since day one)
'03 BMW R1150GS Adventure (Death because of hopistalary infection R.I.P.)
"Never wrestle with a pig. You both get all dirty, and the pig likes it".
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Old 02-06-2012, 12:27 PM   #10
H96669
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Never mind the wiring.....go take some pics!

Yes,saw that on TV not long ago one of them Miss Hooters World show.

http://www.advrider.com/forums/showthread.php?t=400341
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Old 06-14-2013, 09:14 PM   #11
GS Yinzer
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head light / tail light out on my 91 R100GS

last night, after working 2 days straight / spending the night, i started my 91 GS to drive home. both the headlight and taillight weren't working. after 2 16 hour days and a stay over at work, i didn't really give a damn about driving home in the dark. i did however still have my fog lights and brake lights. i headed home, just before the Pirates Game ended around 10:00. i made it home intact and with no ticket.

i read your thread last night, and this morning i took off the seat, removed the tank, and proceeded to clean all of my connections with spray and di electric grease. i also put a new screw down, where the brown ground attached to the frame. i turned the key and WHOOPIE!!!!! headlights and tail lights.

i do have to say, the connections were nasty, corroded, full of green crap. regardless, this needed to be done.

thanks again for a kick ass thread....

ride on.
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