Author Topic: Tailight running light not working, only does when I press the brake pedal.  (Read 712 times)

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Offline mrjuanch

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Does any one have some idea of whats going on?. I've changed the bulb and check the wlres but no luck.
I have some issues with the wiring behind the headlight. When I turn left or right I see that the light shuts on anf off.

I couldnt find the right bulb (left) which has one fillament broken. The one in the right has 2 fillaments vs 1 from the other one.



Thanks guys

My bike cb 550, '74.

Thanks!


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Offline Don R

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You used the wrong bulb? Get the right bulb. Now check the fuse. Look in the manual available above, find the color of the wire in the headlight bucket that feeds the taillight and trace it to find the loose connection/broken wire. It might be as simple as a bullet connector loose. They should snap into place.
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline sammermpc

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Quote
When I turn left or right I see that the light shuts on anf off.

You mean the winkers? Those aren't connected.

I had a very similar issue on my CB500. It ended up being a bad connection within the ignition switch. Does the running light turn on when you move the key to park? I assume not -- I ended up solving it by cracking open the key and cleaning up the contacts in there.

1972 CB500, 1979 CB750F SS (dohc), 1982 Yamaha Maxim XS400

Offline mrjuanch

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Isssue solved. It was a blown fuse.


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Offline Stev-o

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Isssue solved. It was a blown fuse.


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You sure the issue is solved?  Typically, fuse don't just blow for no reason, you may have a short somewhere.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Sprocket75

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I agree with Stev-O. Something caused it to blow the fuse...and this "when I turn left and right I see that the light shuts on and off" worries me.
..."Always two there are, no more, no less. A master and an apprentice"... YODA

1975 Honda CB550K