Post by: Eldrick on February 02, 2023, 04:01:01 PM
Specifically, the issue I have is the wiring, the new coil has a Positive and a Negative terminal on it and it comes with a cable that has one Yellow and one Black wire. My right hand coil connects a Black&Yellow wire to Black and a Blue wire to Blue. The black one must be missing the normal connector as it has been soldered onto the Black&Yellow one.
I need to know which terminal (on the coil) to connect the nice new Black and the new Yellow wires to and then where to connect them vis-a-vis the Black wire and the Blue wire. As ever, pictures are more helpful, please see below.
New Coil
[attach=1]
Old and New Wires
[attach=2]
Post by: Bryanj on February 02, 2023, 04:45:38 PM
=ve connection to points (blue or yellow)
Post by: Johnny4428 on February 02, 2023, 06:14:41 PM
Post by: Eldrick on February 02, 2023, 07:06:56 PM
Some dicey looking wiring there! But a work in progress of course!
I am tempted by a new loom... ;D
Post by: Johnny4428 on February 02, 2023, 10:18:10 PM
Some dicey looking wiring there! But a work in progress of course!
I am tempted by a new loom... ;D
Wise move! 😜
Post by: Laverdaroo on February 03, 2023, 07:26:48 PM
Some dicey looking wiring there! But a work in progress of course!
I am tempted by a new loom... ;D
I concourm its not worth the hassle with that lot!...............no offence mind. ;)
Post by: McCabe-Thiele (Ted) on February 03, 2023, 09:11:26 PM
Some dicey looking wiring there! But a work in progress of course!
I am tempted by a new loom... ;D
I avoided the DS 400 loom as some of the colours are different- I'm not the most competant Sparky so bought one from this firm.
All the colours were the same as my original.
.https://www.electrexworld.co.uk/acatalog/Wiring-Harnesses.html
Post by: Multiman on February 15, 2023, 05:39:23 PM
It didn't matter as the cable was in a connector to connector run so not possible to get wrong anyway.
Just me recent experience.
Post by: Athame57 on February 16, 2023, 07:37:51 PM
FYI I've just fitted a DSS loom and there was only one cable that was the wrong colour.Lucky you! They must have changed the product or supplier because I had issues with the one I got a few years back.
It didn't matter as the cable was in a connector to connector run so not possible to get wrong anyway.
Just me recent experience.
Post by: Multiman on February 17, 2023, 12:59:27 PM
But good that they appear to have got it right now.
I would have bought the Electrex loom had a I known about it, correct and cheaper.
Note to self, ask the forum first!
Post by: Eldrick on February 17, 2023, 07:35:51 PM
Post by: Multiman on March 08, 2023, 10:46:35 AM
+ve connection to power in (black/white)
=ve connection to points (blue or yellow)
Does this make any difference?
In my very limited understanding, the primary is just a coil of copper wire with two ends, so how can it matter if the "signal" interrupt is going +ve or -ve.
I only ask as I've just fitted two new coils from DSS and have the wires the other way round to the above and thew motor runs ok.
Happy to be corrected though.
Post by: McCabe-Thiele (Ted) on March 08, 2023, 11:08:07 AM
The debate back then was to do with the spark starting at the spark plug centre electrode and jumping across to to the outer contact.
The argument was that if you did not switch the coil polarity the spark would start at the outside plug contact and jump inwards affecting the ignition burn. It might have been the other way around I forget.
The direction of current flow in terms of electron flow was the reason iirc it is negative to positive. In reality most people did not bother they were more concerned about the Radio wires needing reversing!
Personally I would just make sure they are both the same - I followed the coil markings - iirc I made a new mini loom to get the connections to reach in a tidy manner. Its seems a popular subject of debate.
https://physics.stackexchange.com/questions/461742/what-is-the-direction-of-the-electricity-flow-in-a-dc-circuit
.
For me its a bit like when you started to learn Chemistry - Elements were made up of just three indivisible sub-atomic particles - Electrons, Neutrons & Protons - the reality is somwhat different. I am happy with the 3 constituents for my grasp on the world never seen a quark, neutrino, positron to name but a few never mind the Higgs Boson.
Post by: Multiman on March 08, 2023, 11:24:37 AM
I live and learn
Post by: Johnny4428 on March 08, 2023, 11:47:17 AM
(Some very wise and clever people on this forum)
Sent from my iPhone using Tapatalk
Post by: Sesman on March 08, 2023, 12:32:01 PM
Believe me, there are far better explanations on’t tinder web….
Post by: McCabe-Thiele (Ted) on March 08, 2023, 01:53:20 PM
Eventually you reach the dizzy height of Expert - you know everything about nothing. 😁😁😁
Post by: K2-K6 on March 08, 2023, 02:09:43 PM
Back in the 1960's early Minis were negative earth I think it was so when upgrading to fit an alternator you had to change to positive earth as most car alternators were like that. Also you would switch the coil wire at the same time.
The debate back then was to do with the spark starting at the spark plug centre electrode and jumping across to to the outer contact.
The argument was that if you did not switch the coil polarity the spark would start at the outside plug contact and jump inwards affecting the ignition burn. It might have been the other way around I forget.
The direction of current flow in terms of electron flow was the reason iirc it is negative to positive. In reality most people did not bother they were more concerned about the Radio wires needing reversing!
On these bike coils with paired plug output, one plug is run inverted to the other for each coil, so both example exist here. Shouldn't really matter which way they are connected, unless something else is noted.
If you compare the two plugs from each coil after longer term use you'd see opposed "wear" pattern resulting from this.
Post by: McCabe-Thiele (Ted) on March 08, 2023, 02:29:04 PM
Post by: Bryanj on March 08, 2023, 02:49:20 PM
The reason for swopping car coil input leads was something to do with this as if left the overheated, and it was eary that was pos earth everything now is neg earth
Post by: K2-K6 on March 08, 2023, 03:06:41 PM
The bit I find most amusing is that Honda's 1960's points system, by utilising two double ended coils, completely eliminated the distributor, it's cap and rotor arm etc, which the motor manufacturer's never picked up on. It's a very simple shift in interpretation, easily achieved.
It would be easy on any ohc car design with advance mech, and maybe even things like pushrod motors as the cam nose would have facilitated this if needed.
Post by: Sesman on March 08, 2023, 10:19:13 PM
Yes Ted, as Bryan notes with the coils.
The bit I find most amusing is that Honda's 1960's points system, by utilising two double ended coils, completely eliminated the distributor, it's cap and rotor arm etc, which the motor manufacturer's never picked up on. It's a very simple shift in interpretation, easily achieved.
It would be easy on any ohc car design with advance mech, and maybe even things like pushrod motors as the cam nose would have facilitated this if needed.
FM