7 replies to this topic

[Andysmayfair]

I know this has been asked before, BUT!!!

Does anyone have a schematic for YMC10654 from mini spares??

I'm fitting it into my 1989 Mayfair with servo brakes and also fitting new electronic ignition with the ballast resistor.

The trouble I'm having is that I seem to be getting a 78 ohm reading through the white pink wire but there is also another one on there which is not mentioned on haynes manual schematic.

Also I have a few spare wires that are loomed in with the ignition barrel plug. I would like to know what they're for.

Has anyone fitted one of these looms??

I've already sent an email asking minisparss for help.

Thanks to all

Andy

Edited by Andysmayfair, 24 February 2024 - 04:47 PM.

[Ethel]

I know this has been asked before, BUT!!!

Does anyone have a schematic for YMC10654 from mini spares??

I'm fitting it into my 1989 Mayfair with setvi brakes and also fitting new electronic ignition with the ballast resistor.

The trouble I'm having is that I seem to be getting a 78 ohm reading through the white pink wire but there is also another one on there which is listed on haynes manual schematic.

 

78 ohms sounds very high for ballast resistance. Not sure what you mean by "another one" - Some prengaged starters had the ballast wire terminate on their bypass terminal, with the yellow/white (in series) feeding the coil. It'd either feed the ballasted supply to the coil, or unballasted when the solenoid operated.

Also I have a few spare wires that are loomed in with the ignition barrel plug. I would like to know what they're for.

Has anyone fitted one of these looms??

I've already sent an email asking minisparss for help.

Thanks to all

Andy

Edit: It doesn't matter if it's pink to solenoid, then yellow to coil, or pink yo coil, then yellow to solenoid.

 

Quite likely there'll be a plain white alternative for electronic ignition too.

[Andysmayfair]

There's a break in the weather, so just confirming.

At the coil I have a plain pink wire and also a white/yellow crimped together. Also terminating at the same point are 2 white/blacks on a female crimp.

The electronic ignition kit has a black wire with a male spade connector on it. This doesn't seem to make sense to me as it will not clip onto the earth of the coil without being modified.

[Ethel]

Right, 

 

I'd suspect your leccy ignition would prefer an unballasted 12v, go off the fritting instructions if there are any.

 

The white/black are for the coil's -ve terminal. One goes the distributor and is what fires the coil when the dizzy stops it earthing. The other is for a rev counter to sense rpm.

 

It really depends on the electronic ignition kit whether you need a ballasted supply.

 

With points you'd want a total of 3 ohms resistance. Either all between the coil's + & - terminals, or half from the ballast (pink/white) & half from the coil. If the electronic kit is for points replacement you'll want the same, so the coil resistance will decide. Some kits have their own ballast built in - the instructions should give details of the coil to use & how to wire it.

 

If the kit has two wires, one will connect to the coil -ve (possibly that black). The other (red?) will be the +ve supply* to operate the electronics. Earth with be through the dizzy body.

 

* fitting instructions again, but likely 12v from a solid white ignition live (which could be the coi9l's +ve terminal if it's a 3 ohm (unballasted) coil.

[Andysmayfair]

I've got the powerspark ignition set up, all pre-built with a ballast resistor and new coil, as recommended by powerspark. I have added the ballast resistor just before the coil for now on the pink and white/yellow wire. On crankingbthe engine I am getting a spark.

I need to get out there to check and set up the timing. I read somewhere to roughly set it I just need to point the dist cap in a certain direction. So hopefully that goes well.

I have oil flowing when cranking so that's good news and I have fuel flowing as well. So hopefully it will jump into life a little later on.

Still trying to figure out the wiring on the new loom as there seems to be some spares, but I'm getting there, I think!

Thanks for the help and advice, it's always welcome!

Edited by Andysmayfair, 27 February 2024 - 09:20 AM.

[Andysmayfair]

Hi

I've managed to find this working diagram written by another owner with a similar confusion as me. I take no credit for it and if I ever meet the creator I will buy them dinner and a drink!

Minispaees tell me that the pink white wire is itself the resistor for the coil. That'll be a new one for me but this is all new to me so I will check that out. Should I run in a separate feed for the powerspark electronic ignition kit as that came with a ballast resistor??

I'll update what I fond out when I find it out so it may help someone out in the future!  Mini wiring diagram 88-93.pdf   535.78K   5 downloads

[Andysmayfair]

Here's the other file

Attached Files

•  Mini wiring diagram 88-93 (key).pdf   58.29K   6 downloads

[Lplus]

Hi

I've managed to find this working diagram written by another owner with a similar confusion as me. I take no credit for it and if I ever meet the creator I will buy them dinner and a drink!

Minispaees tell me that the pink white wire is itself the resistor for the coil. That'll be a new one for me but this is all new to me so I will check that out. Should I run in a separate feed for the powerspark electronic ignition kit as that came with a ballast resistor??

I'll update what I fond out when I find it out so it may help someone out in the future! Mini wiring diagram 88-93.pdf

If the ignition module came with a ballast resistor you can use that with a separate feed from the fuse box to the coil positive/powerspark unit, or use the pink/white  resistance wire to the coil positive without the ballast resistor as the pink/white wire will povide resistance in the circuit.

Edited by Lplus, 05 March 2024 - 04:12 PM.