[Mg-mmm] ignition switch re-visited

[Lew Palmer]

The following is a comment from Tom Metcalf who knows as much about Triple-M
authenticity as anyone I know. And even he isn't completely sure:
============
You're right about the window but I didn't delve into that one because of
typical variations. I use black Lucas 4 position on J's (OFF D S H) and
brown Rotax on P/N's with same markings. I do think MAYBE some were
summer/winter or low/high, but truthfully I really think those were TA era.
PLC 2 sounds right without looking it up.

But basically, I think the 2 positions of OFF D allowed the dynamo to either
be OFF or ON, whereas the TA charging system allowed a LOW and HIGH charge.

No expert but that's my take based on what I've seen.

Also, why would MG use Lucas on earlier cars, and Rotax on later P's and
N's? Best guess is Lucas ended up with tons of brown Rotax PLC's after Rotax
and CAVwere consumed by Lucas, hence ending up with that kool little 3 spoke
steering wheel looking logo for the combined companies.
==========
-----Original Message-----
From: mg-mmm-bounces at autox.team.net [mailto:mg-mmm-bounces at autox.team.net]
On Behalf Of Carr&Edwards
Sent: Thursday, August 11, 2011 11:21 AM
To: Listserve Triple-M
Subject: [Mg-mmm] ignition switch re-visited

Here's a fine state of affairs!  Two people who certainly should know their
MMM's have different opinions on whether this switch is correct for PA0935:

FP series key
        window shows "1  2  side  head"  [I omitted the 4th position on my
original post,
             so that part of Lew's comment is irrelevant]
        "Lucas" stamped into face (not printed on)
        7 wiring connectors on the back:  F2/D/F1  [top];  L/T/A/H  [bottom]

Lew Palmer says "no" :
    The PLC2 is the right model, however, the switch should have FOUR
positions
and no window. The positions are "Low" or "Summer", "High" or "Winter",
"Side" and "Head". This assumes use of the original cutout/fusebox. F1 and
F2 positions lead to the cutout from whence there is a lead to the field
coil of the dynamo.

Jerry Felper says "yes":
    The 1,2, side, head is the proper switch for the PA.


Does anyone else want to venture an opinion on this???  (I think I remember
seeing a no-window, "Low/High" with my SA parts, but they're long gone).


Sarah Carr
PA0935 in Penna.
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