Alternator fitting today

[Grumpy21]

As per my other post I’ll be fitting an alternator conversion later today.

The topic above which has no wiring diagram is blank - the link doesn’t work

I’ve read around the topic and have found this…….


Remove Large Yellow wire between Dynamo and D Terminal of Control Box (you can disgard it)

Remove Large Yellow/Green Wire from Dynamo and F Terminal of Control Box (You can disgard it)

Disconnect thinner Yellow wire from D Terminal on Control box (Charge Warning Lamp) and connect to small wire from alternator (IND)

Connect Large Wires from Alternator (Both of them) to Solenoid connection that is fed directly from the battery


But as I plan to retain the control box as a junction box only can any confirm the following will be OK?

Remove the E earth wire from the control box and connect to a known good earthing point on the body (necessary or not?)

Leave all the heavy brown wires on A and A1 as they are connected together inside the control box.

Kit supplied by ESM

Thanks

[philthehill]

Here you are!!

alternator wiring diagram.jpg (407.64 KiB) Viewed 1295 times

[Grumpy21]

Thanks Phil

What do you think of my plans for the earth wire and leaving the browns on the control box?

[geoberni]

I'd have placed a bet on you having a question about

....retain the control box as a junction box only...

So many instructions on converting to an Alternator don't make it clear how to connect it.

See this site, it's very explanatory, the 3rd diagram on the page shows exactly how to do it. Just ignore the fact that the MGA used 2 x 6v batteries instead of a single 12v one...

https://mgaguru.com/mgtech/electric/ac101.htm

[svenedin]

I'd have placed a bet on you having a question about

....retain the control box as a junction box only...

So many instructions on converting to an Alternator don't make it clear how to connect it.

See this site, it's very explanatory, the 3rd diagram on the page shows exactly how to do it. Just ignore the fact that the MGA used 2 x 6v batteries instead of a single 12v one...

https://mgaguru.com/mgtech/electric/ac101.htm

Not that I would ever dream of changing to an alternator but those are very good instructions Berni. As the RB106 control box is prominent on the bulkhead, in my view it is better to leave it in place and use it as a junction box. Removing it is likely to leave an obvious and ugly ghost of where it was unless the engine bay was recently painted. Of course it's up to owners to do what they wish but if they go to car shows they must be prepared for disapproving comments! I once had someone bending my ear about how the lens on the end of indicator stalk was the wrong shade of green!

Stephen

[myoldjalopy]

You should have told him it was a 'must-have' mod!

[geoberni]

Not that I would ever dream of changing to an alternator but those are very good instructions Berni. As the RB106 control box is prominent on the bulkhead, in my view it is better to leave it in place and use it as a junction box. Removing it is likely to leave an obvious and ugly ghost of where it was unless the engine bay was recently painted. Of course it's up to owners to do what they wish but if they go to car shows they must be prepared for disapproving comments! I once had someone bending my ear about how the lens on the end of indicator stalk was the wrong shade of green!

Stephen

I see so many Alternator Conversions where the wiring looks completely bar-steward-ised, from inline splices to just an insulated terminal post on the bulkhead.
Some people think they have to gut the insides out of the RB106, while others think they need to fit a shorting link inside it.
The only possible reason to gut the RB106 is if someone wants to hide a Big Fuse holder inside it, and whether that is really necessary is questionable, when you consider the likely failure modes that would allow such a fuse to be of any practical value.
I say this based on the fact that many people will not actually understand where they are placing the fuse in the circuit, in relation to the Alternator Output, the Battery and the supplied services on the vehicle....

[svenedin]

You should have told him it was a 'must-have' mod!

Actually, he was right and it was the wrong shade of green. It was a replacement that was too light in shade. The lenses are very fragile and sometimes they break when changing the bulb. The modern copies are too light. I found a stash of the originals, NOS which are a darker shade of green. The light green ones are annoying if you drive at night on country roads as they light up the whole cabin when indicating; not good for night vision.

Stephen

[59Elva]

There is or was a product called the Gener-Nator

https://gener-nator.com/product-info

that incorporates an alternator inside a Lucas generator body. The webpage looks light on details now. Looks like the company has drifted toward American replacements. Anyone have any experience with these?

[geoberni]

Actually, he was right and it was the wrong shade of green. It was a replacement that was too light in shade. The lenses are very fragile and sometimes they break when changing the bulb. The modern copies are too light. I found a stash of the originals, NOS which are a darker shade of green. The light green ones are annoying if you drive at night on country roads as they light up the whole cabin when indicating; not good for night vision.

Stephen

Try having a Lucas SPB120 on the Dash in front of you.... but at least it's Red...

20170905_171618.jpg (383.82 KiB) Viewed 1113 times

[geoberni]

There is or was a product called the Gener-Nator

https://gener-nator.com/product-info

that incorporates an alternator inside a Lucas generator body. The webpage looks light on details now. Looks like the company has drifted toward American replacements. Anyone have any experience with these?

No personal experience, but over in the UK there are a few manufacturers/suppliers, using the product names such as Dynamator or Dynalite (less common).
They are even available in 6v for vehicles with pre-war electrical systems, inc early VW Beetle and in Positive Earth.

[svenedin]

There is or was a product called the Gener-Nator

https://gener-nator.com/product-info

that incorporates an alternator inside a Lucas generator body. The webpage looks light on details now. Looks like the company has drifted toward American replacements. Anyone have any experience with these?

No personal experience, but over in the UK there are a few manufacturers/suppliers, using the product names such as Dynamator or Dynalite (less common).
They are even available in 6v for vehicles with pre-war electrical systems, inc early VW Beetle and in Positive Earth.

There are a number of different companies making alternators that look like a Lucas C40 dynamo externally. Some are relatively inexpensive and of foreign manufacture and others are very expensive but made in Britain and guaranteed for life. You might say they should be guaranteed for life at that price!

An example of one of the expensive British ones is here:https://www.holden.co.uk/p/lucas-c40-dy ... ve-earth-1

If I absolutely had to change from a dynamo I would use one of these.

Stephen

[Grumpy21]

Sadly my alternator didn’t arrive ESM are short staffed and didn’t post it on the day it was ordered ( they usually do and are most helpful). So the Morris sits idly in the garage until Monday and another toy comes out to play. Thankfully the sun is shining!