The procedure for changing an electronic tach is detailed in the Moss MGB
Catalog. If you don't have it, you can download it from
www.mossmotors.com.
David Littlefield
Houston, TX
'62 MGA MkII
'51 MGTD
'88 Jaguar XJ-S
On Fri, 23 Jun 2000 09:49:49 -0400 Brian Warmuth
<warmuthb@WLSC.WVNET.EDU> writes:
> Well, I don't have that problem because my tach is mechanical drive.
> Yours is electric and requires you to take it out of the instrument
> panel , I believe take the tach rear cover off and "reverse" the
> coiled
> wire located inside. At one time there were detailed instructions on
> how
> to do this in a Moss Motors catalog or magazine. Perhaps someone can
> help you with that. I don't know the exact process.
>
> Brian Warmuth
>
> Maffei Andrew P SSgt 27 LG/LGQPT wrote:
> >
> > Someone did that to my 66B, I think it was when they swapped the
> generator
> > to an alternator. now I don't really know how it's done, but the
> only
> > problem now is the original tach will not work at all, and I have
> tried.
> > if anyone out there knows how to fix this please let me know ( and
> yes I did
> > try swapping the wires at the coil)
> >
> > > -----Original Message-----
> > > From: Brian Warmuth [SMTP:warmuthb@WLSC.WVNET.EDU]
> > > Sent: Friday, June 23, 2000 6:28 AM
> > > To: mgs@autox.team.net
> > > Subject: Pos to neg
> > >
> > > I suppose this topic has been covered before and there are
> probably some
> > > web-pages which deal with the specifics of the process, but I
> would like
> > > to convert my MGA from the positive ground to negative ground
> > > arrangement. I believe it is fairly easily done, but does
> anybody have
> > > a step-by-step? It has the original fuel pump, however I have a
> rebuilt
> > > one (converted to operate on negative ground) to install. Since
> the car
> > > has no "electrical" gauge do you just switch the battery ground,
> switch
> > > the coil wires, and re-polarize the generator?
> > >
> > > Mucho TIA!
> > > Brian Warmuth
> > > 52 TD (Rhd), 58 ZB, 59 MGA (1500), 60 Farina Magnette
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