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Locked Turn signal intermittent

 

I have a 1976 R90/6 and the right rear turn signal is intermittent.

The front right turn signal works fine. The flasher on the instrument cluster does not flash. A few times the right rear has started flashing intermittently and when it does, the flasher on a instrument cluster also flashes.

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Is it possible the flasher relay could be bad or does that work for left and right side?
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All the wiring and connectors seem to be fine. and nothing wrong with the bulb.?
 

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When it comes to electrical issues the first thing to do is to clean the terminals using electrical contact cleaner.

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I had 2 problems on a K1100RS, horn on switch cluster and turn indicator switch in a different cluster. I removed the switches from the handlebars, turn them over and sprayed them with contact cleaner. The clear spray dribbled out was the colour of ink. No more problems.

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Frank

Down Under ?

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From: [email protected] [mailto:[email protected]] On Behalf Of DAVID LEMAIRE via groups.io
Sent: 19 April 2023 11:03 AM
To: [email protected]
Subject: [R90SWORLDNET] Turn signal intermittent

?

I have a 1976 R90/6 and the right rear turn signal is intermittent.

The front right turn signal works fine. The flasher on the instrument cluster does not flash. A few times the right rear has started flashing intermittently and when it does, the flasher on a instrument cluster also flashes.

?

Is it possible the flasher relay could be bad or does that work for left and right side?

?

All the wiring and connectors seem to be fine. and nothing wrong with the bulb.?
 

I had a similar problem on my ¡®74 R90/s, turn signals worked then intermittently stopped flashing, including dash light. Replaced flasher unit and problem persisted, then replaced instrument light cluster with Kat-dash unit and problem solved, plus much better/visible instrument lights.
 

My assumption is that you?should see the?same behavior and front and rear flasher if it is related?to the relay. However a relay can become sick and sometimes repaired. The attached?picture shows a relay from my wifes R90S, where the flashing was erratic, sometimes no flashing and other times work as intended.

The problem was in the soldering on the printcard. In direct translation from Danish?- it was a "cold soldering". A good warm resoldering of the point fixed the issue :-)

image.png

Best regards

Steen
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Den ons. 19. apr. 2023 kl. 08.52 skrev Martin Cole <mc2bmwr90s@...>:

I had a similar problem on my ¡®74 R90/s, turn signals worked then intermittently stopped flashing, including dash light. Replaced flasher unit and problem persisted, then replaced instrument light cluster with Kat-dash unit and problem solved, plus much better/visible instrument lights.

 

Maybe this is too simple. But if the right rear bulb doesn't draw current for any reason, perhaps the draw through the flasher is too weak to cycle the flasher. I would start from the bulb and work forward until you have current. My experience with old cars is bad bulb and/or socket contacts is low-hanging fruit.
 

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I don¡¯t think that¡¯s the issue because the front flasher is flashing, but not the rear. ?I also swapped bulbs on both sides and I know the bulb is good.

Guess I need to remove the tank and do some more wire checks again.

On Apr 19, 2023, at 9:42 PM, Martin Johnson <Dermodad@...> wrote:

Maybe this is too simple. But if the right rear bulb doesn't draw current for any reason, perhaps the draw through the flasher is too weak to cycle the flasher. I would start from the bulb and work forward until you have current. My experience with old cars is bad bulb and/or socket contacts is low-hanging fruit.

 

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The /6 turn signals (aka trafficators, etc etc) are, stock, wired for parallel-connected right side (front and rear) lamps; and, the same for the left side.? When the turn signal switch is activated, the electricity comes from terminal 49a of the flasher unit to the turn signal switch, and then to both lamps on the side of the bike, as selected.? Thus, if one side, front, is flashing, and not the rear, then the rear lamp is bad, or, the wiring or socket is bad.? A test lamp or voltmeter will tell the story.??

NOTE that the indicator lamp is not connected to the left or right lamps circuit, but has to a separate circuit inside the flasher unit.? Note, additionally, that, assuming the lamps are all making proper contact and wiring intact, that a bad front or rear lamp results in the indicator lamp flashing once, and then it stays un-lit¡­.³Ù³ó¾±²õ is to tell you a lamp or connection to a lamp, has failed.
If the flasher unit is not the stock unit, then you may have a bit more fun and games to figure out.

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Snowbum (AKA Robert Fleischer)




Learn from the mistakes of others, because you cannot
live long enough to make them all yourself!
A large number of good tests, inspections, measurements and both good
and bad experiences, are more valuable than many opinions, particularly
if found in a Facebook Group.
ABC 1843; MOA Life 17058; AMA Charter Life 73254; etc.
Carson City, Nevada

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From: [email protected] <[email protected]> On Behalf Of DAVID LEMAIRE via groups.io
Sent: Thursday, April 20, 2023 7:44 AM
To: [email protected]
Subject: Re: [R90SWORLDNET] Turn signal intermittent

?

I don¡¯t think that¡¯s the issue because the front flasher is flashing, but not the rear. ?I also swapped bulbs on both sides and I know the bulb is good.

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Guess I need to remove the tank and do some more wire checks again.



On Apr 19, 2023, at 9:42 PM, Martin Johnson <Dermodad@...> wrote:

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Maybe this is too simple. But if the right rear bulb doesn't draw current for any reason, perhaps the draw through the flasher is too weak to cycle the flasher. I would start from the bulb and work forward until you have current. My experience with old cars is bad bulb and/or socket contacts is low-hanging fruit.

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--

Robert (Snowbum) Fleischer, Carson City, NV, USA






ABC 1843; MOA Life 17058; AMA Charter Life 73254; USCA 6504¡­..
?(???)?
 

Good logic...


On Fri, Apr 21, 2023 at 1:24 PM, Martin Johnson
<Dermodad@...> wrote:
Maybe this is too simple. But if the right rear bulb doesn't draw current for any reason, perhaps the draw through the flasher is too weak to cycle the flasher. I would start from the bulb and work forward until you have current. My experience with old cars is bad bulb and/or socket contacts is low-hanging fruit.

 

I suspect your right rear turn signal fixture or the ground circuit is corroded.

Ted

On Friday, April 21, 2023 at 03:03:50 PM EDT, RALPH JUST <daigored@...> wrote:


Good logic...


On Fri, Apr 21, 2023 at 1:24 PM, Martin Johnson
<Dermodad@...> wrote:
Maybe this is too simple. But if the right rear bulb doesn't draw current for any reason, perhaps the draw through the flasher is too weak to cycle the flasher. I would start from the bulb and work forward until you have current. My experience with old cars is bad bulb and/or socket contacts is low-hanging fruit.

 

So after some more testing I discovered the powered wire to the RR turn signal had an internal break under the seat in the harness. (Blue wire with black stripe. ) Right where the tool container rubs against it and the frame.

The wire seems somewhat brittle and has some small cracks and it was wrapped with electrical tape in this area. I wiggled it while doing a continuity check with my VOM and it would go on and off.

I suppose I¡¯ll need to cut out a section and solder in a new patch. I hate to cut into the harness, but seems there aren¡¯t many good options at this point.

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