mini0998 wrote:
There was also a 15AC that has an internal regulator.
I call them ACRs, it saves me confusion.
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| Alternator wiring https://www.ausmini.com/forums/viewtopic.php?f=2&t=81838 |
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| Author: | coopar [ Thu Jun 20, 2013 9:12 am ] |
| Post subject: | Alternator wiring |
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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| Author: | drmini in aust [ Thu Jun 20, 2013 9:41 am ] |
| Post subject: | Re: Alternator wiring |
coopar wrote: 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 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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| Author: | coopar [ Thu Jun 20, 2013 12:30 pm ] |
| Post subject: | |
Do the different regulator models require different wiring? |
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| Author: | drmini in aust [ Thu Jun 20, 2013 12:44 pm ] |
| Post subject: | |
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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| Author: | coopar [ Thu Jun 20, 2013 4:33 pm ] |
| Post subject: | |
Mmm bulb working you say. More investigation needed! Cheers doc |
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| Author: | mini0998 [ Thu Jun 20, 2013 6:45 pm ] |
| Post subject: | |
There was also a 15AC that has an internal regulator. |
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| Author: | drmini in aust [ Thu Jun 20, 2013 7:13 pm ] |
| Post subject: | |
mini0998 wrote: There was also a 15AC that has an internal regulator.
I call them ACRs, it saves me confusion.
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| Author: | Convertible Mini [ Fri Jun 21, 2013 10:51 am ] |
| Post subject: | Clarification nrequired |
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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| Author: | drmini in aust [ Fri Jun 21, 2013 11:01 am ] |
| Post subject: | |
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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| Author: | John Smidt [ Fri Jun 21, 2013 11:28 am ] |
| Post subject: | |
drmini in aust wrote: 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... 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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| Author: | drmini in aust [ Fri Jun 21, 2013 11:54 am ] |
| Post subject: | |
Ah OK... thanks John.
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| Author: | Convertible Mini [ Fri Jun 21, 2013 2:35 pm ] |
| Post subject: | Alternator Mix up. |
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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| Author: | winabbey [ Fri Jun 21, 2013 2:50 pm ] |
| Post subject: | |
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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| Author: | winabbey [ Fri Jun 21, 2013 3:09 pm ] |
| Post subject: | |
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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| Author: | coopar [ Fri Jun 21, 2013 7:30 pm ] |
| Post subject: | |
Ahh cheers for the diagrams, that'll be a big help! Heres mine. 
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