Great, Paul. I was hoping I wouldn't have to rewire-especially since I don't
even know if the alt. off the parts car works. I'll test it out first then
see what happens.
Thanks,
Monte
----- Original Message -----
From: "Paul Hunt (T)" <paul.hunt1@blueyonder.co.uk>
To: "MonteMorris" <mmorris@nemr.net>; "MG list" <mgs@autox.team.net>
Sent: Tuesday, December 30, 2003 3:20 AM
Subject: Re: HIF overflow-solved-Now alternator swap
> Yes, you should just be able to plug and play. There were various
> combinations of one and two brown wires over the years, but in the case of
> the 74 and the 79 even though the earlier has one thin and one thick and
the
> 79 two thick they both go to the same places on both years and are hence
at
> the same potential. I could understand the thinner brown wire on the 74
> having the marker as that was used as a sense wire and not a charging wire
> at some point, but on the 79 the two thick wires are used to double-up on
> current carrying capacity i.e. they have the same purpose. Just confirm
> that the two large spades on the 74 are connected together by doing a
> resistance check with an ohmmeter in *both* directions. They should both
> show zero ohms. The other thing to bear in mind is that the 17ACR has a
> lower maximum current than the 18ACR so as more electrical load is applied
> the 17ACR will stop charging the battery sooner than the 18ACR. But
> assuming a roadster with no aftermarket electrical load the difference
will
> probably be accounted for by not having a heated rear screen. When
> connected you need to monitor the battery voltage with the engine running
at
> idle and switch everything on including wipers (wet screen please) and
stop
> lights. As long as the battery voltage stays above 12.8v it is charging.
> If it is below that see just how much you have to increase the revs to
bring
> it above 12.8v, and bear that in mind if ever you are stuck in traffic
with
> everything on. In fact when stuck in traffic start switching things off
> that aren't strictly needed, like put the handbrake on instead of sitting
> there with the footbrake on, use an intermittent wipe if you can, turn
> headlights off if you can etc.
>
> PaulH.
>
> ----- Original Message -----
> From: "MonteMorris" <mmorris@nemr.net>
> To: "MG list" <mgs@autox.team.net>
> Sent: Monday, December 29, 2003 11:34 PM
> Subject: HIF overflow-solved-Now alternator swap
>
>
> > Regarding the alternator swap from the 74 parts car to the 79;
> > The one out of the 74 is a 17ACR and the one in the 79 is an 18ACR,
Lucas.
> > They both have the same plug, but the 79 has two large brown wires and a
> > smaller brown/yellow. The large brown wire farthest from the small
> > brown/yellow has a small white sleave on it; evidently a marker of some
> > kind. The 17ACR has the same colors of wires in the same places, but a
> > smaller brown wire in place of the white-sleaved brown one on the 18ACR.
> Can
> > I just "plug and play" the 17ACR in place of the 18ACR?
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