Breva 750 intermittent rear turn signal

[M0T0Geezer]

I need to get to the 5-way tail lamp & turn signal connector inside the rear fender on a Breva 750.

Can anyone tell me here if the rear wheel has to be removed  to do that, or how best to locate and repair it?



Thanks,

'Geezer

[Pfaff!]

Really dont know or maybe remember, but download the parts manual and the shop dito. Both are found for free and should give you a clue if you havent got the bike next to you.

[delrod]

Just stating the obvious isn't the turn signal supposed to be intermittent. You know on off :pop

[Pfaff!]

 

Just stating the obvious isn't the turn signal supposed to be intermittent. You know on off :pop

  ;D

[Chuck in Indiana]

Normally, that connector isn't the problem. Is it just one side?

[Muzz]

The only time I have had the connectors apart was when I had the fender off to get the gearbox out. After searching my depleted brain cells I suspect that it would be easier with the rear wheel out.

[M0T0Geezer]

Normally, that connector isn't the problem. Is it just one side?

Yes it is just the right rear turn signal that sometimes fails to flash at all.  The other three turn signals always work OK.

Typical Example:
The right rear turn signal will flash OK before the ride.
Afterwards (100-200 miles), the right rear often will no longer flash.
Pounding (closed fist) on the rear fender (above the tail light assembly) restores the right rear turn signal flash function.

That tells me the problem is an intermittent/corroded connector that must be at the rear of the bike.

I know the right rear signal lamp itself is OK.
I have checked the connection at the external right rear turn signal and it is OK.
The intermittent/corroded connector must therefore be the "inside" 5-way connector as pictured.

Original question still remains:
How do I best gain access to this item?

Thanks

[Pfaff!]

Demount the turn signal glass, use a small screwdriver to bend the contact terminal a bit outward, refit.

[Muzz]

Pounding (closed fist) on the rear fender (above the tail light assembly) restores the right rear turn signal flash function.

That tells me the problem is an intermittent/corroded connector that must be at the rear of the bike.

I know the right rear signal lamp itself is OK.

The intermittent/corroded connector must therefore be the "inside" 5-way connector as pictured.

Original question still remains:
How do I best gain access to this item?

Thanks

From memory, (which as I said before could be faulty) that 5 point connector is nestled between the black plastic cover underneath the seat, and the mudguard itself. I seem to remember that I worked from the back in, and the wheel definitely had to come out.

[sign216]

On a bad signal of mine, the problem tarnish was so slight, I almost overlooked it.  Clean the contacts, even if they look good.

But as said before, access is the real problem.

[nunzio]

Demount the turn signal glass, use a small screwdriver to bend the contact terminal a bit outward, refit.

This fixed my Eldo yesterday...the ears of the Bulb weren't up FIRM against the socket...Alan

[sign216]

This fixed my Eldo yesterday...the ears of the Bulb weren't up FIRM against the socket...Alan

Nunzio, that was enough to keep the light out?  That the bulb contacts weren't pressing hard enough?  What was your fix?

I ask because I've got a similar issue with a '65 Gilera, that has moped style electrics.  The ignition coil grounds via the brake light.  Right now the brake lights up, but it seems that the bulb isn't letting enough current through to properly ground the coil.  I.e. engine dies when the brake light goes on.

[Pfaff!]

Nunzio, that was enough to keep the light out?  That the bulb contacts weren't pressing hard enough?  What was your fix?

I ask because I've got a similar issue with a '65 Gilera, that has moped style electrics.  The ignition coil grounds via the brake light.  Right now the brake lights up, but it seems that the bulb isn't letting enough current through to properly ground the coil.  I.e. engine dies when the brake light goes on.

It finally turned out to be the fix with my long lasting problem on the Breva front turn signal. So why not?

[sign216]

It finally turned out to be the fix with my long lasting problem on the Breva front turn signal. So why not?

So Anders, what did you do?  I'm thinking of filing the two bulb contacts down, to present a flatter contact surface.  More contact should equal more current.
Bending the contact tabs on the mount is possible...but I didn't think would work as well.

There are two contacts because it's brake+tail light.  

[nunzio]

Nunzio, that was enough to keep the light out?  That the bulb contacts weren't pressing hard enough?  What was your fix?

I ask because I've got a similar issue with a '65 Gilera, that has moped style electrics.  The ignition coil grounds via the brake light.  Right now the brake lights up, but it seems that the bulb isn't letting enough current through to properly ground the coil.  I.e. engine dies when the brake light goes on.

There wasn't enough pressure against the bayonet part of the bulb holder and the base of the bulb would back away from the base of the  holder.

It was subtle enough that just a tiny bit of upward pressure on the glass part of the bulb and it would work.

I noticed this ....after awhile of trying some other things.

The little "tits" on the bulb needs to be solid against the slot in the holder.

I was able to get to the part in the holder where the bottom part of the bulb meets the the holder where the current goes into the bulb

There were three brass bits( bulb contact in the holder)  that were folded over and I straightened them out a little with a dental pick which put pressure on the bulb.



I just happen to see some bulbs at a store and it looked like the base at the bottom (ceramic part that surrounds the positive electrode)was deeper than my old bulb and might push the bulb against the bayonet part of the holder....I will keep that in mind if this happens again.


 

[nunzio]

Nunzio, that was enough to keep the light out?  That the bulb contacts weren't pressing hard enough?  What was your fix?

I ask because I've got a similar issue with a '65 Gilera, that has moped style electrics.  The ignition coil grounds via the brake light.  Right now the brake lights up, but it seems that the bulb isn't letting enough current through to properly ground the coil.  I.e. engine dies when the brake light goes on.

So when your brake light bulb burns out or you pull the bulb... the bike won't start?

[sign216]

So when your brake light bulb burns out or you pull the bulb... the bike won't start?

Bike starts, runs fine.  Dies when the brake light is on.

All older Italian mopeds were wired this way.  When the brake light is burnt out, and the brake is depressed, the ignition coil isn't grounded.  Engine dies.  Issue is that w mine, the light is fine.  Lights up bright.  But engine still dies.  but only at idle.  At high revs, engine keeps going. 

So I'm wondering if the bulb connections is poor.  Particularly since the engine doesn't die, if I put a jumper across the brake light terminals.  I.e. just a wire with no bulb. 

[nunzio]

Bike starts, runs fine.  Dies when the brake light is on.

All older Italian mopeds were wired this way.  When the brake light is burnt out, and the brake is depressed, the ignition coil isn't grounded.  Engine dies.  Issue is that w mine, the light is fine.  Lights up bright.  But engine still dies.  but only at idle.  At high revs, engine keeps going.  

So I'm wondering if the bulb connections is poor.  Particularly since the engine doesn't die, if I put a jumper across the brake light terminals.  I.e. just a wire with no bulb.  

Do you have a schematic you could link?

Sounds like bulb not making contact..
Have you tried a different bulb?

Interesting problem....Alan

[sign216]

Do you have a schematic you could link?

Sounds like bulb not making contact..
Have you tried a different bulb?

Interesting problem....Alan

I've had the same thought re a different bulb.  A 12v bulb had same results, and now I bought a 6v bulb of different specs to try as well.  

Oddly, the brake burns bright, like it's making great contact.  It's just that the engine still dies, which goes against expectations.
The guys at Moped Army forum had no good ideas.

I'm going to try the other bulb, and then perhaps an LED.

I'd attach a copy of the wire diagram, but I don't see attachments as an option.  Am I missing it?