-----Original Message-----
From: Bob Howard <mgbob@juno.com>
To: mgs@autox.team.net <mgs@autox.team.net>
Date: 30 August 1999 20:32
Subject: 1980 MGB LE Wiring question
> On behalf of a friend and neighbor who is doing a magnificent
>restoration of his car, I'm passing to the list some questions he has
>been unable to answer from the manuals and from looking at another LE.
>His request follows. If you can help, respond to me, I'll print it and
>carry the copy over to him.
>Thanks,
>Bob
>
>
> Need help in connecting wiring to ballast resistor (two terminals), coil
>and factory-installed Lucas Electronic ignition.
>1. Lucas electronic ignition module
> 1 white wire ?
White is the 12v ignition feed to the electronic ignition and also the
electronic ignition ballast resistor. Confusingly it looks like it connects
from a white/brown from the No. 2 fuse. This white/brown may also feed the
coil ballast, or it may also become a white before it reaches the coil
ballast. The coil ballast is a length of resistance wire contained within
the loom, the electronic ignition ballast is a visible component.
> 1 white/black wire?
White-black is the LT feed from the electronic ignition to the coil -ve and
from there to the tach.
> The red and blue wire to distributor and ground wire are OK-no problem.
>
>2. Wires in harness to coil and ballast resistor
> white/light green? ( 2 wires, 1 terminal?)
White/light-green comes to the coil +ve from the coil ballast and goes on to
the solenoid. This solenoid terminal supplies a full 12v to the coil during
cranking to boost the spark.
> white-single wire?
Same as white above, it is the ignition feed to the electronic ignition and
ignition ballast resistor.
> white/black (2 wires, 1 terminal?)
Same as above, one comes from the electronic ignition to the coil -ve and
the other goes on to the tach.
>3. Also in harness to coil and ballast resistor are the following wires,
>but I don't belive they are used with electronic ignition:
> 3 wire connector with:
> 1 white wire
As above, it is the 12v ignition feed to the electronic ignition.
> 1 white/blue with terminal on one end
White/blue is the feed from the ignition ballast resistor to the electronic
ignition.
> 1 white/black
Same as above, it is the LT feed from the electronic ignition to the -ve of
the coil (and then onto the tach).
>4. Question--where are the five wires in #1 and 2 connected? On coil and
>ballast resistor? Elsewhere?
Where the physical interconnections are I don't know, but basically all
like-coloured wires are connected together. The only confusing thing is
that at one point the whites connect to a white/brown from the No. 2 fuse,
which comes from the ignition relay.
>
>Thanks.
>
|