Author Topic: new wiring loom  (Read 384 times)

Offline JHG1958

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new wiring loom
« on: 06.07. 2020 18:41 »
I am not happy to use the standard wiring loom for my Golden Flash.  The main reasons for this are:
  • I wanted an in-line fuse
    I am changing to 12v by putting a belt drive on the dynamo and a 12volt regulator
    I am changing to negative earth (not really sure why I am doing this, LED bulbs?)
    I want use an earth wire rather than rely on the frame
    I am changing to electronic ignition
    I want to put in a wireless relay rather than an ignition key (better security)
    I plan to use the lighting switch to isolate/energise the wireless relay
So I have a plan and produced a wiring diagram attached.  I would appreciate comments from you guys


I hope by putting power to the wireless relay from the lighting switch, if the relay fails, the bike will stop but the lights will stay on (sounds a good idea to me).
I hope by using a wireless relay positioned under the seat will make it difficult for people to Hotwire the bike.

So, moving the lighting switch to position 2 energises the relay and the pilot light, horn, tail light and brake light.
The remote control can then be used to energise the ignition and the engine can be started.
I will be able to run the bike without the headlamp on if I need to charge up the battery.

The third position on the lighting switch energise the headlamp.
The engine can be stopped by turning the light switch to position 1 or pressing the remote.

Rude comments on a postcard

John

Offline JHG1958

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Re: new wiring loom
« Reply #1 on: 06.07. 2020 18:43 »
Pants picture try this pdf

Online Greybeard

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Re: new wiring loom
« Reply #2 on: 06.07. 2020 18:49 »
Pants picture try this pdf
It looks like the remote relay is energised all the time.

Online Greybeard

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Re: new wiring loom
« Reply #3 on: 06.07. 2020 18:55 »
The loom I bought for my bike has a return, (earth) wire.

Offline JHG1958

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Re: new wiring loom
« Reply #4 on: 06.07. 2020 19:49 »
Pants picture try this pdf
It looks like the remote relay is energised all the time.


No. The red line to E is the switched line coming out at A.  Energising the relay is D (blue) with common earth F.

I heard the new looms had a earth wire. Sounds a good idea.

Online Black Sheep

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Re: new wiring loom
« Reply #5 on: 06.07. 2020 22:33 »
A 12v regulator and a 6v dynamo ain't a good combination in my experience. You can end up with commutator segments flying off (half way over the Forth Bridge at night with a long way to go in one instance). Go the whole hog and get the dynamo upgraded while you are at it.
2 twins, 2 singles, lots of sheep

Online RichardL

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Re: new wiring loom
« Reply #6 on: 06.07. 2020 23:50 »
As one who relies on the magneto and little else to assure I get home regardless of battery condition, this looks like three (or so) points of failure that were not present when the bike left Small Heath.

Richard L.
Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Online chaterlea25

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Re: new wiring loom
« Reply #7 on: 07.07. 2020 00:32 »
Hi JHG,
In normal circumstances the horn and brake light are not wired through the ammeter

I have a custom loom and switch gear on my SR including a multi fuse block but rely on magneto ignition (original BTH not the modern thing)

John
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Online groily

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Re: new wiring loom
« Reply #8 on: 07.07. 2020 06:42 »
Dont quite get the Dyn & Reg wiring. Think you need to look at lettering again? Dyn F to reg F, power off A for ammeter etc and E to earth. Could be I'm cross eyed from looking at sruff on a phone cos I'm away on holiday, but it doesnt look very right from this corner of Sicily!
Not had  probs with the 12v / '6v' mix myself but I know there are schools of thought. The only dyn that I threw the comm on was a fine-wound '12v' job!
Bill

Online Rex

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Re: new wiring loom
« Reply #9 on: 07.07. 2020 08:39 »
A 12v regulator and a 6v dynamo ain't a good combination in my experience. You can end up with commutator segments flying off (half way over the Forth Bridge at night with a long way to go in one instance). Go the whole hog and get the dynamo upgraded while you are at it.

I've long agreed with this principle too. A nominally 6V dynamo runs really hot when regulated at 12V, and even though many say they've done it and it works fine I wouldn't trust it either to last or to work effectively.
I rebuilt the dynamo with a 12V armature and field coil and it provides more than enough output to run the lights etc reliably.

Offline BSA_54A10

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Re: new wiring loom
« Reply #10 on: 07.07. 2020 08:52 »
Better security ?
really ?
The days of opertunistic thieves roaming the countryside looking for magneto powered bikes to pinch by riding away on them ended around 1980
If a thief wants your bike they will take it
Hiding a tracking device might mean you will be able to find out where they put it or follow the truck containing it.
A pocket pager will posssibly alert you to the fact your bike is being stolen just soon enough to watch the truck driving away with it or a bit earlier so you can get punched in the face before they drive away with it.
So all you doo-dad will do is fall apart when you are 100 miles from help and in a phone dead spot so by the time you get help your bike will be gone .,
Bike Beesa
Trevor

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Re: new wiring loom
« Reply #11 on: 07.07. 2020 09:31 »
There have been all sorts of arguments on this forum which stem from people making modifications to their bikes. Some people fall into the 'Keep it original' category, others say 'make as many improvements as you can' and some fall somewhere in between. My opinion is that you should have a fairly clear view of how you expect to use the bike and build it accordingly. A think 12v is a good idea but I would do a proper conversion, i.e. 12v armature, field coil, and regulator. I can't see the point of any of the other modifications you are making, or the benefits don't warrant the effort. Don't forget that the more you modify your bike the less of a 'classic' bike it is. The A10 was a good bike and, if put together properly, will serve your needs perfectly well in its original form. I find the new 'Lucas' looms supplied by Wassell to be of very good quality, not perfect, but very good.

Offline JHG1958

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Re: new wiring loom
« Reply #12 on: 07.07. 2020 11:04 »
I can appreciate the keeping it original school of thought. I have kept the engine and gearbox as a Golden Flash, no fancy cams or pistons. In any case I would like to keep the Golden Flash looking like a Golden Flash since that as the reason I bought the bike. So chrome tank painted valence mudgards, etc. A bit of a dilemma about using a twin leading shoe front brake. This question can wait.  Perhaps a new thread about keeping it original vrs modifications.

The main reason for putting in a wireless relay is so I do not have an ignition switch. I think it will improve security in a very unobtrusive way, but it is true if they want the bike they will take it.  At the end of the day a bloody big chain around a lamp post is probably best.  I must admit I have not heard of a lot of classic bike thefts.  I had not thought about a tracking device. I will look into that.

The 12v conversion seems sensible. I had planned to use my dynamo plus a belt drive as recommended by SRM. This feedback is making me think about a rewind or even an alternator as I have no regulator yet especially as I ride with my headlamp on.

I did read all the arguments about the Mag vrs electronic ignition. My mag is in a bad way so I have bought a Lucas electronic kit.  With my old A10 several decades ago, I cooked my mag to drive away the water and it worked fine after that.  Do people still do that?

I would rather make my own loom. I find the electrics fun especially on something as simple as this.  I did note that the horn and the stop lamp were not on the ammeter. I cannot see why not. Trying to get a horn button that does not go to earth may be impossible but I will try.

As for the letters on the regulator. I may have them wrong I took them off a Haynes manual.  Basically it is 2 wires to the dynamo then positive and negative output.  The headlamp switch is a bit of black hole.  I will have to buy one and see.

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Re: new wiring loom
« Reply #13 on: 07.07. 2020 11:17 »
The horn button: Mine does earth to the handlebar but the steering assembly is earthed inside the headlamp cowl and then returns via the loom. The horn itself has a return wire in the loom.

My security measures: I have a hidden mag kill switch. If I must leave the bike unattended I have a f-off heavy duty chain to lock the bike to a tree or lamp post etc.

Offline Seabee

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Re: new wiring loom
« Reply #14 on: 07.07. 2020 12:53 »
I use my fork lock as a short stop anti-theft device. Big chain and lock otherwise...…………..
1961 Super Rocket
1957 Road Rocket
2009 Harley Electra Glide Classic
1993 Harley Springer Softtail
1970 Harley Sportster Chopper
1957 Harley Panhead Chopper
1982 Yamaha XT550
2001 KTM EXC 400
1970 Honda CT70
Southern Illinois, USA