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Re: More Lost Electrons [Re: Peter J] #742170
17/05/22 05:07 PM
17/05/22 05:07 PM
Joined: Aug 2013
Posts: 15,063
Salisbury, UK
Peter J Offline OP
Formerly known as Aldermog
Peter J  Offline OP
Formerly known as Aldermog
Member of the Inner Circle

Joined: Aug 2013
Posts: 15,063
Salisbury, UK
The brake lights don't work... but I don't get a "bulb failure" warning, which should happen if a bulb fails.
So it isn't simple.
There are no obvious fuses for the brake lights.

There are strange things happening here... The Prince of Darkness seems to be at large.


Peter,
66, my 2016 Porsche Boxster S
Tarka 2014 Plus 8....Off the road, since March!


Re: More Lost Electrons [Re: Peter J] #742176
17/05/22 05:20 PM
17/05/22 05:20 PM
Joined: Jul 2019
Posts: 2,651
L
Luddite Offline
Talk Morgan Expert
Luddite  Offline
Talk Morgan Expert
L

Joined: Jul 2019
Posts: 2,651
Sorry Peter, I do not know the operation of bulb fail monitoring aspect of the circuit. My expectation would be that as brakes are a safety circuit that any monitoring of their operation would not affect their primary function, and that monitoring would be a secondary and seperate part of the circuit that should be unable to affect the primary function.... But then I have been wrong before, and more than once... blush

Re: More Lost Electrons [Re: Peter J] #742197
17/05/22 09:22 PM
17/05/22 09:22 PM
Joined: Feb 2013
Posts: 271
north yorkshire
B
B3MOG Online content
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Joined: Feb 2013
Posts: 271
north yorkshire
Peter, I may be completely wrong here but when I was in industry when canbus systems were popping up one of the problems I found was that at the end of the wiring cct (canbus) there is usually a small resistor in the cct that sometimes fails... of course it may all be different nowadays.


David Byrne

Re: More Lost Electrons [Re: Peter J] #742198
17/05/22 11:55 PM
17/05/22 11:55 PM
Joined: Sep 2010
Posts: 2,104
Wales
T
Taffmog Offline
Talk Morgan Expert
Taffmog  Offline
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T

Joined: Sep 2010
Posts: 2,104
Wales
Peter, just change your dealer......


1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8
Re: More Lost Electrons [Re: B3MOG] #742201
18/05/22 06:08 AM
18/05/22 06:08 AM
Joined: Feb 2016
Posts: 5,088
East Harling, Norfolk UK
RichardV6 Offline
Charter Member
RichardV6  Offline
Charter Member

Joined: Feb 2016
Posts: 5,088
East Harling, Norfolk UK
Originally Posted by B3MOG
Peter, I may be completely wrong here but when I was in industry when canbus systems were popping up one of the problems I found was that at the end of the wiring cct (canbus) there is usually a small resistor in the cct that sometimes fails... of course it may all be different nowadays.


David Byrne

That ties in with the Canbus on my Roadster David. On the topology schematic there are 120Ω terminator resistors on medium and high speed networks linking BCU, PCM and instrument cluster. Guessing these are to load the networks and hide any random transients that might otherwise errantly trigger something.

It also shows twisted pairs of interconnecting cables carrying high and low signals on each network, again designed to cancel out random inductions.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1945 Moto Guzzi Airone
Re: More Lost Electrons [Re: Taffmog] #742202
18/05/22 06:25 AM
18/05/22 06:25 AM
Joined: Feb 2016
Posts: 5,088
East Harling, Norfolk UK
RichardV6 Offline
Charter Member
RichardV6  Offline
Charter Member

Joined: Feb 2016
Posts: 5,088
East Harling, Norfolk UK
Originally Posted by Taffmog
Peter, just change your dealer......

It might be the way to go Peter. Such an annoying random fault on a limited production run hybrid system is, pardon me for suggesting, seemingly beyond the pay grade for most if not all Morgan dealers. At this stage I would tempted to seek out a Canbus expert (easily said I know) and better spend money there.

My brother had a Mondeo Titanium X with a recurring, annoying dash problem. He had no help from Ford but found such an expert who had come up with a fix for the random electronic speedo error's he was suffering.


Richard

2018 Roadster - Red/Magnolia - "Morton"
1966 Land Rover series 2a SWB
1945 Moto Guzzi Airone
Re: More Lost Electrons [Re: Peter J] #742244
18/05/22 02:56 PM
18/05/22 02:56 PM
Joined: Feb 2013
Posts: 271
north yorkshire
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Joined: Feb 2013
Posts: 271
north yorkshire
Peter, just had a thought, you haven't changed any bulbs or electrical devices lately because if I remember correctly a small deviation from the expected resistance will send things haywire.
Also don't trust any chinese made bulbs they may not be compatible , they also generate a lot of electrical noise.

David Byrne

Re: More Lost Electrons [Re: asbojohn] #742251
18/05/22 04:54 PM
18/05/22 04:54 PM
Joined: Sep 2015
Posts: 1,082
TheCustomer Offline
Has a lot to Say!
TheCustomer  Offline
Has a lot to Say!

Joined: Sep 2015
Posts: 1,082
Originally Posted by asbojohn
Originally Posted by TheCustomer
Originally Posted by asbojohn
Got mine back from a factory service a couple of weeks back. Similar issue with the lights that now seems to have been fixed.


ah, is that Peter's rear lights issue, or my flickering headlamps issue?!

Will


Your problem seems some interna breaks on the wiring.





many thanks John - I'll let Williams know, and hopefully they can fix it.

I guess Morgan bought a job lot of Mini Cooper headlamps in 2007, with wiring - so my 2017/8 build car has 15 year old wiring in places.

Will


Aero 8 S5
BMW i8 Coupe
Re: More Lost Electrons [Re: Peter J] #742452
20/05/22 08:00 PM
20/05/22 08:00 PM
Joined: Mar 2014
Posts: 675
Berkshire/Oxon & Devon
JB62 Offline
Talk Morgan Regular
JB62  Offline
Talk Morgan Regular

Joined: Mar 2014
Posts: 675
Berkshire/Oxon & Devon
Had the friendly little “ bulb failure” message again today. Checked all lights- all good. Only failure seems to be the warning. Hopefully when I fire it up tomorrow to drive to Stonor it will have gone.


V8 Speedster ( current)
4/4 Competition spec (5 years)
4/4 4str Kent ( 10 years)
Re: More Lost Electrons [Re: Peter J] #742476
21/05/22 10:37 AM
21/05/22 10:37 AM
Joined: Mar 2014
Posts: 675
Berkshire/Oxon & Devon
JB62 Offline
Talk Morgan Regular
JB62  Offline
Talk Morgan Regular

Joined: Mar 2014
Posts: 675
Berkshire/Oxon & Devon
It’s gone.

Til next time?


V8 Speedster ( current)
4/4 Competition spec (5 years)
4/4 4str Kent ( 10 years)
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