Don't have any MGC diagrams but I can't imagine what the purple would be for
there, sounds like a PO addition. Does it come out of the loom or is it
loose? If loose where does it go? Purple on the MGB is fused, always hot,
for things like the horn and interior lights. Does the old switch have four
terminals? Or was the purple attached to the same terminal as one of the
others? Is the purple connected to anything i.e. what happens if you
connect a fused 12v supply to it? Or does it show 12v when something else
is switched on? If the front running lights didn't come on with the other
three wires connected then maybe that wire (red on an MGB) is damaged up
front somewhere and the PO ran in a purple to bypass it. In which case it
should go with the red on the switch.
----- Original Message -----
From: "JAMES SCHULTE" <schultejim@prodigy.net>
To: <Mgs@autox.team.net>
Sent: Wednesday, July 16, 2003 3:47 AM
Subject: Wiring question/ head light switch 69C
> I changed the head light switch on my 69 MGC Roadster today and discovered
the original had 4 wires attached to it, 1- red 2- blue 3- brown 4- purple.
The problem is the replacement switch only has 3 posts. The wiring diagram I
have from the C manual only shows 3 wires and purple is not one of them.
What is the purple for? I tried the new switch and everything worked front
and back head lights tail lights, liscence plate lights only exception was
the front running lights(turn signals did work). What is the purple wire for
and can I double it up on another post, and if so which post?
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