Dennis,
I have attached an old post from Dan Masters which outlines some wiring
strategy and basic wiring - I found it very useful and trust you will also.
Dr. Doug
Dan's post>
Although the MGs and the Triumphs are very similar electrically, the Triumph
diagrams are so much easier to follow. The MG diagrams try to show the
physical layout, as well as the electrical arrangement. I am currently in the
process of redrawing the MG diagrams to make them easier to read, but at the
rate I work, it will be a while before I'm done.
The best advice I can offer, is to take the diagrams to a copier that can make
enlargements, and have them blown up to 11 x 17 size. Then use neon markers to
trace the wires. It is a lot simpler than it first appears, and after a little
while, it will become quite easy.
The second step is to become familiar with the color codes, at least for the 4
primary groups:
1) Brown wires. These are the primary power distribution wires from the
battery/alternator. They are hot at all times, and are NOT fused.
2) Purple wires. These are hot at all times, and are fused. They are fed
from
the Brown wires. These are typically for courtesy lamps, trunck lamps, etc.
3) White wires. The are hot only when the ignition key is on, and they are
NOT
fused. These are primarily the ignition circuits, and other components
required to run the engine, such as the fuel pump.
4) Green wires. These are hot only when the ignition key is on, and they
are
fused. They are fed from the White wires. These are for accessories that only
operate when the car is running, such as WS wipers, Turn Signal, etc.
Memorizing these color codes will help a lot. The other color codes are not so
important to remember, as you can look them up as you go. There are over 50
different color codes used in an MG!
Hope this helps a little.
Dan Masters,
Alcoa, TN
'71 TR6---------3000mile/year driver, fully restored
'71 TR6---------undergoing full restoration and Ford 5.0 V8 insertion - see:
www.sky.net/~boballen/mg/Masters/
'74 MGBGT---3000mile/year driver, original condition
'68 MGBGT---organ donor for the '74
-----Original Message-----
From: owner-mgs@autox.team.net On Behalf Of DenRP@aol.com
Sent: Monday, November 17, 1997 10:34 AM
To: mgs@autox.team.net
Subject: Wiring cross reference
Is there any publication that lists a cross reference for the wiring color
codes. I have a Hayes manual with a wiring diagram but it would be nice to
have a listing of the various wire colors and at least the general items they
serve. I have found a couple of violet (purple) wires under the dash that
have been cut.
Are there any other manuals that would be good to have for working on my B.
Dennis Pfeifer
Ft Collins,CO
MGB
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