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herbg
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Before I start the troubleshooting process, I thought I'd check here for some tips.

My 1969 R69S has been sitting for about a month. I did not have the battery on a trickle charger.

The bike started up with a few kicks. Once running, I noticed that both left & right Hella Bar End Signals weren't working. When I pressed the horn switch, I got a very faint "honk".

I'm wondering ... is this a simple dead battery? The headlight and generator lights are bright and seem to work fine.

I've never had a problem with the signals before. Prior to this, everything was working perfectly.

I appreciate any troubleshooting tips as I try to figure this one out.

Thanks,
Herb...

schrader7032
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VBMWMO #7032
San Antonio, TX
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Hella Bar End Signals & Horn: Suddenly not working

Herb -

These systems are pretty straightforward...I don't think it has anything to do with the battery once the bike is running. The horn button just creates a path to ground for the power...power is routed to one side of the horn, out the other side, and then to the horn button. Pressing on the button provides a path to ground through the handlebars, steering stem bearings, and back to the battery ground. There's probably also a screw on the back of the horn that can be adjusted to get the horn pitch correct.

As for the bar end signals, I believe their ground is at the far end of the handlebars. Again, power is routed to the bulbs, through the filament, and to ground. Pushing the button, sends power, through the flasher, down to the bulb.

I'd check your grounds for these. Probably some corrosion from sitting.

Kurt in S.A.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

Allan.Atherton
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Re: Hella Bar End Signals & Horn: Suddenly not working

"herbg" wrote:

... My 1969 R69S has been sitting for about a month. I did not have the battery on a trickle charger.... Once running, I noticed that both left & right Hella Bar End Signals weren't working. When I pressed the horn switch, I got a very faint "honk". I'm wondering ... is this a simple dead battery? The headlight and generator lights are bright and seem to work fine...

Yes, it is just a dead battery. The battery only powers the lights and horn when the generator is spinning slowly at idle. Above idle, the generator does the powering. If the battery is dead or low, you will only have lights and horn when the motor is over maybe 1000 rpm, fast idle.

Going for a hour's ride should charge up the battery and give you back the lights and horn at idle. If not, then there could be a problem with either the battery, regulator or generator.

schrader7032
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VBMWMO #7032
San Antonio, TX
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Re: Hella Bar End Signals & Horn: Suddenly not working

"Allan.Atherton" wrote:

Yes, it is just a dead battery. The battery only powers the lights and horn when the generator is spinning slowly at idle. Above idle, the generator does the powering. If the battery is dead or low, you will only have lights and horn when the motor is over maybe 1000 rpm, fast idle.

Allan -

I didn't see anything in the original post about the issue being at idle RPM only. Herb indicated that things weren't working...I would have thought that if they worked once the engine spun up, he would have said that. Might be a bad assumption on my part.

Even at idle, I would think there should be enough power from the generator to run the signals/horn. I'm experiencing something of a minor charging problem...the battery on my R69S recently measured only 5v. I noticed something didn't look right when I first shoved in the key. The generator and neutral lights looked weak. Once the bike started, those lights looked the usual bright at idle. I've since trickle charged the battery and will be looking at generator output at high RPMs. I might not just riding it enough!!

Kurt in S.A.

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'78 R100/7 '69 R69S '52 R25/2

Allan.Atherton
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Re: Hella Bar End Signals & Horn: Suddenly not working

"schrader7032" wrote:

... I didn't see anything in the original post about the issue being at idle RPM only. Herb indicated that things weren't working...I would have thought that if they worked once the engine spun up, he would have said that. Might be a bad assumption on my part ...

It sounded like his lights and horn worked OK before the bike sat for a month.

"schrader7032" wrote:

... Even at idle, I would think there should be enough power from the generator to run the signals/horn. ...

As I remember, on bikes with low batteries, the horn will squawk and the lights glow dimly at idle when the red light is on, and will then work more normally when the red light goes out as the revs rise.
I have a friend who only rides a few times a year and her bike is like that. The battery dies and sits, and then will not take a charge from the generator. We are to meet for a ride to a rally this weekend, and I expect her bike will as usual have no horn or lights at idle.

herbg
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Hella Bar End Signals & Horn: Suddenly not working

Thanks for the tips.

Just to clarify:

1) The horn and signals worked fine prior to this
2) The bike has sat for long periods before and this problem didn't crop up
3) When the bike is started and running at fast idle, the horn works great but the signals are dead ... all other lights are perfect
4) When the bike is not started, and the ignition key is on, all lights work except for the horn and signals

Maybe there's a loose connection somewhere. I installed a Benchmark Works 6V Halogen Headlight bulb a couple of months ago (works great, btw) ... maybe something came loose?

Herb...

schrader7032
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VBMWMO #7032
San Antonio, TX
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Hella Bar End Signals & Horn: Suddenly not working

Well, with more info, it does appear that the battery needs to be brought back up to snuff...horn works on fast idle but not when the bike is not started (ie, just on battery).

But something else is wrong with the signals. Probably should check the connections. There's a flasher relay in the headlight shell. Might want to recheck that as well. Probably some corrosion somewhere.

Kurt in S.A.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

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