Commando 1970 wiring system

Someone,
please, could help me, i have 4 problems.
The electrical system of my Commando that I'm rebuilding now is 1970 's, other than that of the other Norton I have of 1971/1972/1975.
1.: I bought the "warning light assimilator" but can't find the wires 1970, and the wiring diagram has no installing: How do I mount it or I can not install it?.
2.: If I mount the Boyer Brandsen electronic injection or other should I leave or should I remove the condenser pack?.
3.: No Ballast Resistor, I have to mount it or not or when (with 6 or 12 volt coil?) and should be deleted with electronic inniection?
4.: Finally, as you have to place the three wires (black, white, brown white brown) on the inition swich?
Thank you for the help that you can give me.
Looking forward.
Best regards.
Ciao.
Piero
Italy

pierodn said:

1.: I bought the "warning light assimilator" but can't find the wires 1970, and the wiring diagram has no installing: How do I mount it or I can not install it?.

Click to expand...

A 1970 model normally has an ammeter, and therefore too early to have the 1971-on assimilator which is why the wires are not in the 1970 harness.
The ammeter is the 'charge warning' on pre-'71 models. If you want to fit the assimilator then it can be wired according to the 1971-on wiring diagram (ask if you need more information?).

pierodn said:

2.: If I mount the Boyer Brandsen electronic injection or other should I leave or should I remove the condenser pack?.

Click to expand...

If electronic ignition is fitted then the condenser pack must be disconnected and it can be removed completely if required.

pierodn said:

3.: No Ballast Resistor, I have to mount it or not or when (with 6 or 12 volt coil?) and should be deleted with electronic inniection?

Click to expand...

The ballast resistor must also be disconnected, and removed if required, however a 1970 model would not usually have the ballast resistor (and two 6V coils) as standard, therefore the standard coils are 12V (Lucas 17M12). Two 6V coils (connected in series) are recommended for use with wasted spark electronic ignition systems such as Boyer Bransden, however it is possible to use two 12V coils in series but the results may not be as good as two 6V coils.

http://www.boyerbransden.com/pdf/KIT000 ... 00017_.pdf

pierodn said:

4.: Finally, as you have to place the three wires (black, white, brown white brown) on the inition swich?

Click to expand...

The 1970 model ignition switch should be a simple two position OFF-ON switch with brown/white [NW] and white/brown [WN] wires connected one 'side' of the switch, and white [W] the other side. There is no black wire to the ignition switch shown on the wiring diagram? What does the other end of the black wire connect to?

Dear Sir,
Thank you vey much for your kindly answer.
You are in right, in the iniection switch there is not black wire, i was in wrong, only brown white, white, white brown.
Please again, i have two 6 V coils, they works well ith 1970 wiring syste m?.
Do you think is better o fit Boyer or Pazon, i do not knowh both, because on other my Commando i fitted Lucas Rita and i had never problem.
Looking forward.
Besr regards.
Ciao.
Piero

Sorry again.
I have the ammeter and if i understood weel i do not need the warning light assimilator.
But, please, let me know what the warning light assimilator needs and works, do you think is better to fit on with an upgrade from 1970 to 1971 or is better to leave quite.
Thanks a lot Sir.
Best regards.
Ciao
Piero
Italy

The 6 V coils will work if you use them in the 71 wiring configuration, which means you will probably need a ballast. If you use EI, like the Pazon, you won't need the condensers, MC2, or the ballast. I'm using the Pazon on my 69/70 with 6V coils. I had to replace my 12V coils.

If you need wiring configurations of the inside of the headlamp with the ammeter or the Wipec horn/flasher/dip switch harness as per the 69/70, I can supply that easily.

Dave
69S

Dear Sir,
I would be very happy to receive the wiring configuration inside the headlamp with ammeter.
Thanks a lot for helping me.
Best regards.
Ciao.
Piero
dinuccip@tin.it

DogT said:

The 6 V coils will work if you use them in the 71 wiring configuration, which means you will probably need a ballast. If you use EI, like the Pazon, you won't need the condensers, MC2, or the ballast. I'm using the Pazon on my 69/70 with 6V coils. I had to replace my 12V coils.

If you need wiring configurations of the inside of the headlamp with the ammeter or the Wipec horn/flasher/dip switch harness as per the 69/70, I can supply that easily.

Dave
69S

Click to expand...

Let me know if you have any questions. You can PM if you like.

Dave
69S

pierodn said:

Do you think is better o fit Boyer or Pazon, i do not knowh both, because on other my Commando i fitted Lucas Rita and i had never problem.

Click to expand...

The Pazon is more expensive but is probably the better product.

pierodn said:

I have the ammeter and if i understood weel i do not need the warning light assimilator.
But, please, let me know what the warning light assimilator needs and works, do you think is better to fit on with an upgrade from 1970 to 1971 or is better to leave quite.

Click to expand...

If you want to wire up the assimilator,

Fit the warning light and assimilator unit.

Assuming it is the standard Lucas 3AW assimilator unit, connect one warning light terminal to any white (main power) wire, and connect the other warning light terminal to assimilator terminal 'WL'.

Connect assimilator 'AL' to one of the alternator stator AC output wires, either the green/yellow or white/green (71-on diagrams show the connection to green/yellow however it does not matter which).

Connect assimilator 'E' to any good earth/ground point or harness red wire.

In my ignorance, could someone tell me what the assimilator is? I assume it has to do with the turn signals, but am not sure.

assimilator definition: to take in and utilize as nourishment. from duckduckgo

Dave

DogT said:

In my ignorance, could someone tell me what the assimilator is? I assume it has to do with the turn signals, but am not sure.

Click to expand...

It's the gizmo that controls the charge warning lamp operation on the 71-on models.

http://www.ebay.co.uk/itm/NOS-LUCAS-3AW ... 3a7b22c60a

Thanks.

Thanks a lot,
I understood well.
Best regards.
Ciao.
Piero
Italy

quote="DogT"]





Let me know if you have any questions. You can PM if you like.

Dave
69S[/quote]

Dear Dave,
Please, help me again.
In the picture there is an item, rear to Lighting switch, with withe/brown and red/blak wires.
What is this?.
Looking forward.
Best regards.
Ciao.
Piero
Italy

DogT said:

Let me know if you have any questions. You can PM if you like.

Dave
69S

Click to expand...

Thanks a lot, Sir
Ciao
Piero
Italy

L.A.B. said:

pierodn said:

Do you think is better o fit Boyer or Pazon, i do not knowh both, because on other my Commando i fitted Lucas Rita and i had never problem.

Click to expand...

The Pazon is more expensive but is probably the better product.

pierodn said:

I have the ammeter and if i understood weel i do not need the warning light assimilator.
But, please, let me know what the warning light assimilator needs and works, do you think is better to fit on with an upgrade from 1970 to 1971 or is better to leave quite.

Click to expand...

If you want to wire up the assimilator,

Fit the warning light and assimilator unit.

Assuming it is the standard Lucas 3AW assimilator unit, connect one warning light terminal to any white (main power) wire, and connect the other warning light terminal to assimilator terminal 'WL'.

Connect assimilator 'AL' to one of the alternator stator AC output wires, either the green/yellow or white/green (71-on diagrams show the connection to green/yellow however it does not matter which).

Connect assimilator 'E' to any good earth/ground point or harness red wire.

Click to expand...

G'day, Piero.
Just an opinion from me about the assimilator:- given the choice between an ammeter and an " idiot light", I'd rather have the ammeter.
That's the way all us "boy racers" went in the 70s when we added banks of instruments to our cars.
At least the ammeter can tell you a bit about how much charge is going in or out of the battery. I don't know whether the assimilator does that. I've never had one.
Cheers
Martin

pierodn said:

In the picture there is an item, rear to Lighting switch, with withe/brown and red/blak wires.
What is this?

Click to expand...

That is also the lighting switch.

Thanks Dear Sir,
I mean.
But do you think is possible to it on the warning light with the ammeter?
Tanks or helping.
Best regards.
Ciao
Pieo

[I was in wrong,
I have seen better, only one item.
Thanks a lot.
Ciao
Pieroquote="L.A.B."]

pierodn said:

In the picture there is an item, rear to Lighting switch, with withe/brown and red/blak wires.
What is this?

Click to expand...

That is also the lighting switch.[/quote]

I wonder if Piero doesn't have the original 69/70 parts? In the headlamp shell should be only 3 holes in the top. Center Ammeter, to the rear light switch off/pilot/headlamp, and to the left, the small high beam indicator. The lighting switch has 3 positions. . Only 4 wires go to the switch, red/black(6) for the pilot lamp, brown/green(1) for the speedo/tach lights, white brown(4) to the ignition switch, and blue (8) feed for the handle bar Wipac switch. The numbers relate to the numbers on the back of the switch, which you can see at the bottom of my hand drawn diagram. I think they are actually on the switch too, but hard to see.

Also if you don't have the original Lucas headlamp, there may be no place for the pilot bulb. Quite often they were taken out for a sealed beam lamp.

Dave
69S

[
Thanks Sir,
I understood.
You help me, so i can mount well.
Regards.
Ciao
Piero


quote="DogT"]I wonder if Piero doesn't have the original 69/70 parts? In the headlamp shell should be only 3 holes in the top. Center Ammeter, to the rear light switch off/pilot/headlamp, and to the left, the small high beam indicator. The lighting switch has 3 positions. . Only 4 wires go to the switch, red/black(6) for the pilot lamp, brown/green(1) for the speedo/tach lights, white brown(4) to the ignition switch, and blue (8) feed for the handle bar Wipac switch. The numbers relate to the numbers on the back of the switch, which you can see at the bottom of my hand drawn diagram. I think they are actually on the switch too, but hard to see.

Also if you don't have the original Lucas headlamp, there may be no place for the pilot bulb. Quite often they were taken out for a sealed beam lamp.

Dave
69S[/quote]