Can someone clear up a few things for me.
I have fitted a 15AC. I've always assumed they're internally regulated.
Is there an old and new model? Old not regulated, new internally regulated?
I thought I read that somewhere.

In terms of wiring should I have a hard 12v battery feed to the large spade terminal, and a switched 12v to the small F (field?) terminal? Is the small terminal primarily for the charge light and therefore could I leave that off if I wanted?

My issue is that my alternator/wiring gets very hot within minutes of starting the car. I'm trying to eliminate the wiring before I maybe go and get the alternator tested.

Cheers

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Tim

There is a 15AC and a 15ACR.
15AC had an external 4TR or 8TR reg, these were used on Mk2S, Mini K, MiniMatic from 1969 to 1971.
15ACR came later, was used on Clubbies, these had internal reg, as did the 16ACR and later.

If you wiring is getting hot when running it probably just means it is charging. Later alternators used 2x brown wires on the output, not 1. But check you don't just have a hot joint at the big spade lug on the alternator (mine did)- if it does, solder a new lug on the wire. That fixed mine...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Do the different regulator models require different wiring?

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Tim

Oz Minis with the regulator on the RH inner guard- there are 2 wires to the alternator (apart from the 12V+ output cable) these are for the field control (green/brown), and the indicator lamp circuit (brown/yellow).

If fitting a later Oz Mini alternator 15ACR, 16ACR etc to these early cars you just tape the field wire up and don't use it. You can leave the requlator on there or unplug the multipin connector and take it off, it makes no difference.
The indicator lamp wire needs to be connected to the alternator and the bulb working for the alternator to charge.

As for fitting the Rover and later alternators, I have no idea.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Mmm bulb working you say.
More investigation needed!

Cheers doc

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Tim

There was also a 15AC that has an internal regulator.

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1963 Morris 850

I call them ACRs, it saves me confusion.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Which type of Alternator does this person have? Do you have the Australian 15AC with no plastic cover at the back? or the one with half a plastic cover at the back as used on Mini K and Clubman GT era. The first one (Australian 15AC) should be internally regulated and also some had a stud for B+ terminal and some had large spade. It is risky giving people instructions about such faults without not knowing exactly what they are dealing with. Wires don't get warm for nothing and could be dangerous. Especially on Minis as they have no fusible Links for protection as standard fitting. I find Fusible links a sensible thing to incorporate in a Mini's system.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

First one sold here was not that Australian 15AC (no cover) internal regulated one, it was the UK 15AC, with the separate regulator and 1/2 plastic end cover. It started in 1969. That Oz one came later.

@Coopar, a pic of yours is worth ~1000 words...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I think what convertible mini means, is the first one he mentions. not the first one sold in aust as he explains in the second part the half plastic back was the Mini K Clubman GT & Mk2 S

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" A Hundred Years From Now It will not Matter what my Bank Acount Was,
The Sort Of House I Lived in, Or The Kind Of Car I drove ... But The World May Be A Better Place
Because I was Once Important In The Life Of A Child"

Ah OK... thanks John.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

John you are correct. Unfortunately I don't know how to put Pics up on here so I can explain in Pictures. Also Internally regulated Alternators came after the external type. Probably about 1971 ish they came in, on the first Leyland. I could be wrong.

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DID I MENTION THAT I AM THE BEST SUPPLIER FOR MINI ELECTRICAL PARTS AND REPAIRS?
"Let us remove your "SHORTS"

Following wiring diagrams posted purely for historical purposes as I can't claim to be a knowledgeable sparky. First one from the Lucas Alternator Manual AM 1.72 and the second a Lucas internal drawing.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

Further to the above, vehicle application pages in the Alternator Manual show the Mini range and Mini Clubman up to 1971 having the 15AC, and the later Clubman and Moke MK II having the 15ACR-2D.

There's exploded views of the various alternators that I can post if needed.

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ex-NSW Police 1970 MK II Cooper S
VMCI #43

Ahh cheers for the diagrams, that'll be a big help!

Heres mine.

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Tim