OP
UTC

Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
 
Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
UTC quote
Hi all
I'm going to do this mod posted in 2008. https://modernvespa.com/forum/topic32603. I need to tap into the 14 pin circular connector block (the one that is there for accessory fitting etc.). Are there particular or exact male pins that I can use to go into each "socket" individually as a neat way of doing things - I know I could cut and splice but I'd prefer to do the job neatly.
See pic of the overall block and one of the 14 sockets circled (badly!)
Forum member supplied image with no explanatory text
Forum member supplied image with no explanatory text
@wbdvt avatar
UTC

Molto Verboso
'16 Sprint S 150, 2 x '06 GTS 250, '12 GTS 300, '74 Vespa 150 Super
Joined: UTC
Posts: 1558
Location: Vermont
 
Molto Verboso
@wbdvt avatar
'16 Sprint S 150, 2 x '06 GTS 250, '12 GTS 300, '74 Vespa 150 Super
Joined: UTC
Posts: 1558
Location: Vermont
UTC quote
That is not the alarm acccessory plug. Look at the pics in the link you posted it is a rectangular plug
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
 
Moderaptor
@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
UTC quote
wbdvt wrote:
That is not the alarm acccessory plug. Look at the pics in the link you posted it is a rectangular plug
That was 2008 - this is the 2016 model, which ditched the rectangular connector and went to a round one. See the wiring diagram at: https://manuals.wotmeworry.org.uk/Vespa/GTS300-2015-ABS/
OP
UTC

Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
 
Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
UTC quote
jimc wrote:
That was 2008 - this is the 2016 model, which ditched the rectangular connector and went to a round one. See the wiring diagram at: https://manuals.wotmeworry.org.uk/Vespa/GTS300-2015-ABS/
Yep - it's a 14 pin alright - with 11 slots occupied and 3 empty. I'm still trying to find a neat part - or way - to plug into 4 of these female slots. The 2008 description talks about using "stranded wire, tinned and slightly mashed" which might be the way to go..unless there is a standard pin of course.

The other thing I can't get my head around is a mention in another post on the same topic that talks about grounding to the brake light so that when at traffic lights and with the brake light "on", it would stop the beeping until the brake lever is released. How can that work - I thought I had a reasonable understanding of electrics but I can't fathom that one out, i.e. I'd have thought that the live brake light would, if anything, activate the buzzer, not stop it from buzzing?

The final thing I wondered about is this: If I have the buzzer, why can that not simply be connected to the flasher unit and ground so that it operates when either indicator is "on". That would - it seems to me - cut out the need for all this relatively sophisticated setup that is described by 'Cincinnati John' in the 2008 post. But I must be missing something! And anyway, I'm kinda looking forward to this as a bit of a project!
OP
UTC

Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
 
Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
UTC quote
I think these might be the connectors I need - I could get them as part of an overall connector like that shown in the pic
Forum member supplied image with no explanatory text
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
 
Moderaptor
@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
UTC quote
hcurran wrote:
The other thing I can't get my head around is a mention in another post on the same topic that talks about grounding to the brake light so that when at traffic lights and with the brake light "on", it would stop the beeping until the brake lever is released. How can that work - I thought I had a reasonable understanding of electrics but I can't fathom that one out, i.e. I'd have thought that the live brake light would, if anything, activate the buzzer, not stop it from buzzing?

The final thing I wondered about is this: If I have the buzzer, why can that not simply be connected to the flasher unit and ground so that it operates when either indicator is "on". That would - it seems to me - cut out the need for all this relatively sophisticated setup that is described by 'Cincinnati John' in the 2008 post. But I must be missing something! And anyway, I'm kinda looking forward to this as a bit of a project!
OK, I'll expand on that.

The buzzer will have quite a high (very high if peizo-electric) resistance compared to the brake light. So the brake light bulb can act as a ground for the buzzer with the brake light off. When 12V is applied to the brake light AND the buzzer has 12V applied while the indicators are ON, there's no voltage across the buzzer so it stays quiet.

But silence while the brakes are applied isn't the only benefit. We often hear on MV that the brake light switches have failed stopping the bike from starting - well with the system above you'd know straight away that a brake light switch had failed, as the buzzer would continue to sound even with the brakes on.

Not only that, but if the buzzer didn't sound at all, you'd know the brake light bulb had blown!

So there are important safety gains from wiring this way.
OP
UTC

Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
 
Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
UTC quote
jimc wrote:
OK, I'll expand on that.

The buzzer will have quite a high (very high if peizo-electric) resistance compared to the brake light. So the brake light bulb can act as a ground for the buzzer with the brake light off. When 12V is applied to the brake light AND the buzzer has 12V applied while the indicators are ON, there's no voltage across the buzzer so it stays quiet.
Thanks so much Jim - On the basis that there is no such thing as a stupid question, here goes! Just to be clear, are we saying that I need to ground the buzzer , ie the "-" negative connector of the buzzer to the rear bulb as shown in the attached pic - ie do I need to run a wire from the negative of the buzzer to the ground side of the bulb as shown in my pic , instead of attaching it to the black ground of the alarm connector as shown in 'Cincinnati John's' 2008 diagram?
Forum member supplied image with no explanatory text
@abner_bjorn avatar
UTC

Molto Verboso
2007 GT200, 2008 Yamaha C3, 2009 BV250
Joined: UTC
Posts: 1218
Location: Denver
 
Molto Verboso
@abner_bjorn avatar
2007 GT200, 2008 Yamaha C3, 2009 BV250
Joined: UTC
Posts: 1218
Location: Denver
UTC quote
You ground the buzzer to the + positive side of either brake light. If you ground it to the - side of the brake light, it will have the same effect as grounding it directly to the scooter. The beeping won't stop when you apply the brake.
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
 
Moderaptor
@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
UTC quote
Abner_Bjorn wrote:
You ground the buzzer to the + positive side of either brake light. If you ground it to the - side of the brake light, it will have the same effect as grounding it directly to the scooter. The beeping won't stop when you apply the brake.
Easier to explain by saying: connect the buzzer "ground" to the output of a brake light switch.
OP
UTC

Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
 
Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
UTC quote
jimc wrote:
Easier to explain by saying: connect the buzzer "ground" to the output of a brake light switch.
Thanks it all makes sense now at last 👍. So the buzzer grounds through the low resistance bulb in that case. Thanks again.
@cube avatar
UTC

Enthusiast
2018 Sprint 150 & 2024 GTS
Joined: UTC
Posts: 58
Location: Silver Spring, MD, USA
 
Enthusiast
@cube avatar
2018 Sprint 150 & 2024 GTS
Joined: UTC
Posts: 58
Location: Silver Spring, MD, USA
UTC quote
I've been trying to identify the model of that round connector for a few weeks now with no luck. I've been going through Digikey and all the usual suspects but I cannot figure out what it is. Will be very interested if you manage to identify.
OP
UTC

Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
 
Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
UTC quote
Cube wrote:
I've been trying to identify the model of that round connector for a few weeks now with no luck. I've been going through Digikey and all the usual suspects but I cannot figure out what it is. Will be very interested if you manage to identify.
It's working!
https://photos.app.goo.gl/FeB2gqSFjeGWrMoo7 (short video)
It's loud - great as it will also alert the ear-budded pedestrian at junctions. Now that it's working, my next finessing will be to ground it to the + of the brake bulb wiring so that it is silent when the brake lever is pulled at stops.

I got fed up looking for a suitable male connector / trying to get something to fit and stay in the sockets. So I just cut the wires far enough back that I can re-join at any time. It's all working beautifully, with the switched "+" white wire used but as I'd like the power socket/ battery tender to be unswitched..... here's me last question......

Question: Among the 7 wires that remain uncut, there doesn't seem to be a Red/Blue wire as shown in the 2008 diagram - the unswitched 12 V "+".

To avoid being like the guy in that movie, Juggernaut "Cut the blue!", does anyone know which of the remaining 7 wires is the unswitched 12v+?
I've already used these 4:
Pink & White (Flasher)
Blue (Flasher)
Black - Ground
White -Switched "+"

Thanks to all for the various explanations - I think this is an amazing safety modification and one that should be standard on all models. I can understand though what Rome might sound like with 100,000 beepers! Oddly I was in Italy a few weeks ago and was amazed that Honda and Yamaha were the predominant scooters there. Vespas were really in the minority.
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
 
Moderaptor
@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
UTC quote
I repeat:
jimc wrote:
With colours and everything...
OP
UTC

Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
 
Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
UTC quote
jimc wrote:
I repeat:



With colours and everything...
Thanks again, Jim - and for the record, it's connection 7,"GrNe" (grey/black) that is the unswitched +12v

As an aside, oddly the wiring pdf is B/W but, when printing, it switches to colour!
@jimc avatar
UTC

Moderaptor
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
 
Moderaptor
@jimc avatar
The Hornet (GT200, aka Love Bug) and 'Dimples' - a GTS 300
Joined: UTC
Posts: 44238
Location: Pleasant Hill, CA
UTC quote
hcurran wrote:
Thanks again, Jim - and for the record, it's connection 7,"GrNe" (grey/black) that is the unswitched +12v

As an aside, oddly the wiring pdf is B/W but, when printing, it switches to colour!
You did notice it had many layers with all the different functions highlighted as appropriate?
OP
UTC

Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
 
Hooked
GTS 300 Super '16, (GTS 125 Super written off in Jan 2022 - a 'SMIDSY' incident). Previously a GT125L and an ET4
Joined: UTC
Posts: 105
Location: Cheltenham, UK
UTC quote
jimc wrote:
You did notice it had many layers with all the different functions highlighted as appropriate?
No - I've never seen that before and I've used pdfs for more years than I care to recall!
@cube avatar
UTC

Enthusiast
2018 Sprint 150 & 2024 GTS
Joined: UTC
Posts: 58
Location: Silver Spring, MD, USA
 
Enthusiast
@cube avatar
2018 Sprint 150 & 2024 GTS
Joined: UTC
Posts: 58
Location: Silver Spring, MD, USA
UTC quote
Cube wrote:
I've been trying to identify the model of that round connector for a few weeks now with no luck. I've been going through Digikey and all the usual suspects but I cannot figure out what it is. Will be very interested if you manage to identify.
I found it: it's a Sumitomo HM series sealed connector; the part number is 6181-4451 and the mating connector is 6188-4691.
DoubleGood Design banner

Modern Vespa is the premier site for modern Vespa and Piaggio scooters. Vespa GTS300, GTS250, GTV, GT200, LX150, LXS, ET4, ET2, MP3, Fuoco, Elettrica and more.

Buy Me A Coffee
 

Shop on Amazon with Modern Vespa

Modern Vespa is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com


All Content Copyright 2005-2024 by Modern Vespa.
All Rights Reserved.


[ Time: 0.0134s ][ Queries: 4 (0.0036s) ][ live ][ 318 ][ ThingOne ]