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I'm not very expert in electrickery, and have wired my driving lamps on my AH like so.. they work! and as I want them (on main beam only). Wiring wizards out there, any reason why this shouldn't be ok?? I don't want the loom to go up in smoke! (please excuse the very non technical drawing!)  Sorry but I think you have made a mistake in the drawing. 30 supply 85 earth 87 accessory 86 switched live If 86 is the switched live there should be a connection (probably fused) from the battery to the dip switch (If not combined with the headlight switch there would be the light switch before power arrives at the dip switch) . The switched power should then be on the output side of the dip switch (together with the headlight main beam) . Whilst you are doing this I would also fit relays on the headlight side (both main and low beam) which will protect the switch. To keep it all neat you can obtain plugable relay mountings that can be linked together and you can attach in some convenient place. This is an example: http://www.carbuildersolutions.com/de/black-single-relay-holderThese relay holders can be linked together to make a single block of as many as you want.
Last edited by Gambalunga; 08/02/17 10:31 PM.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Needs to Get Out More!
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Needs to Get Out More!
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Wasn't it Galvani that had twitching frogs legs? I seem to remember some schoolday experiment.
I just wished I could remember it in detail Steve - it's long gone now like so many things, the stand out for us 13 year olds was the fact that the girls were so squeamish. One thing I do remember clearly at the same time was that my Granny's Angina was kept under control with Nitroglycerin tablets. It wasn't long before I started playing with Sodium Chlorate and sugar after that and blowing things up - the rest is history. We had fully explored childhoods in those days  . I've been a bit mutton jeff for a long time - it's no surprise to me. That reminded me of schooldays. We had a Science Society and one after school session was making explosives. From burning magnesium, throwing sodium into water... Moved to gunpowder, some oddball stuff that was quite reactive, a version of napalm ( getting it to ignite was the awkward bit), we even made a "gun" from a length of high strength drilled out rod, 1/4" bore firing ball bearings. Tested at the nearby estuary fired towards the Gower! Returning to the wiring... the frog bit looks like Nigel Farage.
Plus Four MY23 Furka Rouge
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Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
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Wasn't it Galvani that had twitching frogs legs? I seem to remember some schoolday experiment.
I just wished I could remember it in detail Steve - it's long gone now like so many things, the stand out for us 13 year olds was the fact that the girls were so squeamish. One thing I do remember clearly at the same time was that my Granny's Angina was kept under control with Nitroglycerin tablets. It wasn't long before I started playing with Sodium Chlorate and sugar after that and blowing things up - the rest is history. We had fully explored childhoods in those days . I've been a bit mutton jeff for a long time - it's no surprise to me. That reminded me of schooldays. We had a Science Society and one after school session was making explosives. From burning magnesium, throwing sodium into water... Moved to gunpowder, some oddball stuff that was quite reactive, a version of napalm ( getting it to ignite was the awkward bit), we even made a "gun" from a length of high strength drilled out rod, 1/4" bore firing ball bearings. Tested at the nearby estuary fired towards the Gower! Returning to the wiring... the frog bit looks like Nigel Farage. Rather sadly I doubt they are allowed to carry out such experiments these days (safety goggles we never saw those) and I think such experiments lit my fuse for a future in a science related career. They were exciting times as a teenager in a mixed school.
2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev
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Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
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I started doing A level biology. But one day we had to go across to the 'farm' and select a live guinea pig - one to three students. Then we had to gas it in a biscuit tin which was adapted for the purpose. A rubber tube from the gas tap and a second one out of the window.
Before it was cold we had to pin it to a board and dissect it.
That was me finished. I changed to physics.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
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I don't want the loom to go up in smoke! I’m no expert either but if you had say two 55w lamps… might a 20amp fuse be a bit heavy?  I'm sure there's some complicated formula to work out the ideal amperage but maybe trial an error will work so it's just above 'blowing' ? Just found it.. Working out the best fuse to use The equation P = I × V can be rearranged to find the current if the power and potential difference are known: I = P ÷ V So a 10A might just be ok? I think the next one up is 15A. You also need allow a margin, so 15A would be better than 10... I ran mine on more than one vehicle with 20...
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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I started doing A level biology. But one day we had to go across to the 'farm' and select a live guinea pig - one to three students. Then we had to gas it in a biscuit tin which was adapted for the purpose. A rubber tube from the gas tap and a second one out of the window.
Before it was cold we had to pin it to a board and dissect it.
That was me finished. I changed to physics. I think my comprehensive was ahead of its time. All we got to dissect was brussel sprouts in our biology class.
Roger
2011 Plus 4
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Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
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I think my comprehensive was ahead of its time. All we only got to dissected brussel sprouts in our biology class.
 Mmmm, dinner!
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'09 Gen2 MINI Cooper ragtop
'90 LR 90 SW
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Charter Member
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Wasn't it Galvani that had twitching frogs legs? I seem to remember some schoolday experiment.
We had fully explored childhoods in those days . I've been a bit mutton jeff for a long time - it's no surprise to me. Didn't your mother warn you - mine did. 
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Joined: Dec 2009
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Tricky Dicky Member of the Inner Circle
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Tricky Dicky Member of the Inner Circle
Joined: Dec 2009
Posts: 35,777 Likes: 468 |
Wasn't it Galvani that had twitching frogs legs? I seem to remember some schoolday experiment.
We had fully explored childhoods in those days . I've been a bit mutton jeff for a long time - it's no surprise to me. Didn't your mother warn you - mine did.;-) Mine walked away from the family when I was 18 months old - if she did warn me I never remembered  .
2009 4/4 Henrietta
1999 Indigo Blue +8
2009 4/4 Sport Green prev
1993 Connaught Green +8 prev
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New to Talk Morgan
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The original diagram is fine, although you could transpose 85 and 86 if the system really is positive ground. (connection 86 is relay coil positive).
Stick with a 20A fuse because although the steady state current will be about 10A there will be a significantly greater inrush current at switch-on until the lamp filaments warm up.
John
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