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Jun 14th, 2026
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Joined: Dec 2009
Posts: 37,410 Likes: 977
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 37,410 Likes: 977 |
What a nightmare diagram you have to work from. I get mine from the gomog.com site.
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Sep 2009
Posts: 7,435 Likes: 122
Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2009
Posts: 7,435 Likes: 122 |
Ive noticed there are two brake pedal switches on mine too but don't know why either. Can anyone else tell us?
Are the brake lights still working with only one switch working? Its unlikely but could one switch be for the high level brake light? Easy to check for both I suppose.
If you replace the faulty switch I would take a photo of its placement before removing. I assume that both are adjusted the same amount.
Finally I would have thought that the brake light switch is a separate problem than the loss of power unless someone can explain otherwise!
Rob, the second switch is the stop fueling signal to the ECU when you brake. This is very interesting and a novelty for me. I'll check it out on occasion. Only... my car is running fine again. I didn't think that the second switch would cut off the fuel supply when you brake. That could explain the interruptions if this switch is not working properly I always thought that the fuel cut out the moment you stop accelerating so that it's a function of the accelerator pedal. Also because you want to cut off fuel downhill even when not braking but driving without throttle pedal pushed.
'14 4/4 graphite grey
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Joined: Dec 2009
Posts: 37,410 Likes: 977
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 37,410 Likes: 977 |
Ive noticed there are two brake pedal switches on mine too but don't know why either. Can anyone else tell us?
Are the brake lights still working with only one switch working? Its unlikely but could one switch be for the high level brake light? Easy to check for both I suppose.
If you replace the faulty switch I would take a photo of its placement before removing. I assume that both are adjusted the same amount.
Finally I would have thought that the brake light switch is a separate problem than the loss of power unless someone can explain otherwise!
Rob, the second switch is the stop fueling signal to the ECU when you brake. This is very interesting and a novelty for me. I'll check it out on occasion. Only... my car is running fine again. I didn't think that the second switch would cut off the fuel supply when you brake. That could explain the interruptions if this switch is not working properly I always thought that the fuel cut out the moment you stop accelerating so that it's a function of the accelerator. What you say is correct but the fuel stop signal provided to the ECU is probably yet more of this environmental nonsense i.e. belt and braces. On further reflection it could also be necessary since the advent of the fly by wire throttles as if they failed in the full on position the second you hit the brakes the ECU would reduce the fuel supply dramatically. That is my logic applied and not official 
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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Joined: Apr 2019
Posts: 901
Talk Morgan Regular
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Talk Morgan Regular
Joined: Apr 2019
Posts: 901 |
Rob, the second switch is the stop fueling signal to the ECU when you brake. Thanks for the info Richard, hopefully this will solve Stuarts problem! Would it not be possible to do a temporary repair by soldering the wire using your seven foot arms Stuart?
Rob
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Joined: Mar 2017
Posts: 1,615 Likes: 1
Talk Morgan Enthusiast
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OP
Talk Morgan Enthusiast
Joined: Mar 2017
Posts: 1,615 Likes: 1 |
I might have long arms, but I’m short sighted
SFG
2012 4/4 Sport
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Joined: Jul 2007
Posts: 27,809 Likes: 749
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,809 Likes: 749 |
What a complex way to do things. I hope you get it sorted.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Aug 2010
Posts: 5,465 Likes: 171
Charter Member
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Charter Member
Joined: Aug 2010
Posts: 5,465 Likes: 171 |
Brilliant find folks. Hopefully you have saved a few of us many hours of hunting the fault.
I will check mine when next in the garage - just in case.
Thanks again.
Paul
Costock, UK
Plus Four 75th - Furka Rouge - Pip
Disco 5
Teddy - 17h1 Irish Draught cross
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Joined: Dec 2008
Posts: 22,358 Likes: 353
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,358 Likes: 353 |
I don't think my GDI has two switches. I need to check.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Nov 2015
Posts: 8,672 Likes: 489
Just barreling along Needs to Get Out More!
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Just barreling along Needs to Get Out More!
Joined: Nov 2015
Posts: 8,672 Likes: 489 |
![[Linked Image]](https://www.tm-img.com/images/2020/03/30/F61A4EA5-E06C-45C3-9DE4-184D567BE43B.jpg) Rich, Here’s the two switches, wiring removed and you can see the broken terminal on the right of the RH one. That wire is green/purple. It looks like there is no adjustment. Waiting to hear if Uncle M has a switch in stock The plunger switches look fixed length to me (no backnut) I would say the adjustment is in the baseplate - you can see the slots & the nearest securing flanged bolt head
Jon M
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Joined: Dec 2009
Posts: 37,410 Likes: 977
Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 37,410 Likes: 977 |
Rich, Here’s the two switches, wiring removed and you can see the broken terminal on the right of the RH one. That wire is green/purple. It looks like there is no adjustment. Waiting to hear if Uncle M has a switch in stock The plunger switches look fixed length to me (no backnut) I would say the adjustment is in the baseplate - you can see the slots & the nearest securing flanged bolt head If you look very carefully you can discern the difference in the adjustment that has been made utilising the back nut adjuster between the LHD and RHD switches, the exposed thread being the tell tale allied to the corresponding clearance between the skeletal back nut and the switch body, happy to be corrected once SFG has one in his hand though. I have forgotten since I replaced mine on the Sport, as I recall I just screwed it in in all the way as the RHD one appears on the photo, getting in the footwell was quite interesting as I was 16.5 Stone at the time.. It's clearer in Uncle Melvyn's image Brake switch adjustment.![[Linked Image]](https://www.tm-img.com/images/2020/03/31/sww.png) I've used similar limit switches with adjustments such as these in a previous life, as they are by nature just that a level of adjustment is a basic requirement.
2009 4/4 Sport Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Con Green +8 prev
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