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MG MGA - Extra dash wires?

Greetings all,

I'm just finishing up the dash wiring but I have two extra wires I can't figure out the placement for. They are both brown with black tracer. I have the horns wired correctly, using the third brown/black wire. One of these extra wires is smaller/thinner and the other the same size as the horn wire. The smaller one is plain/cut end and the larger one has a screw/round style connector on it. Any ideas what these are used for? Thanks! Cheers!
Robert Maupin

Do you have a heater fitted? I seem to remember that the heater switch has brown cables... Can't be sure of the top of my head and the car is still at the bodyshop
dominic clancy

Horn wires Robert. One to the button the other to the horn via a connector.
Lindsay Sampford

Hi Lindsay,

As I said, there are three (actaully four because as Dominic stated, brown w/ black is also for the heater). I have the correct one already connected to the horns. It's the two "extra" wires I'm not sure about. I have accounted for the heater and horns. Still don't know what the two remaining/extra wires are for? Cheers!
Robert Maupin

Robert, wiring to the heater is green to one side of the switch and green/brown from the other side of the switch to the live side of the motor, then black to earth the other side of the motor. Horn wiring is black (earth) to one side of the button, the other side of the button is black/brown to a snap connector, then black/brown into the harness down to the horn.
Lindsay.
Lindsay Sampford

Robert,
Looking at Barney Gaylord's lovely color coded harness diagram, only two Brown/Black (NB) wires are shown. As Lindsay states, one to the horn button and the other to the main harness for the horn. I recently used his diagrams when I did my dash and it is correct. Curious that you have two extra ones.

Cheers,
GTF
G T Foster

G.T.

Me too. I guess I'll find out when I can finally get around to firing that puppy up and taking it down the road. I figure I have another forty-sixty hours left and then I'm done....that is with the inital restoration. Then I'll have another twenty hours or so figuring out the things that aren't working correctly..... Cheers!
Robert Maupin

you may want to run a test light (the one with the AAA battery inside) to insure the wire you don't hook up lights up the tester.
Lmazoway

There is something nagging me at the back of my brain from when I fitted my loom 13 years ago. Are the 2 wires in fact one wire? i.e. either end of the one wire?

Steve
Steve Gyles

The dash harness has one browN/Black wire from the horn push button to a bullet end. This is the only wire end in the dash harness that does not connect directly to something on the dash. Use a snap connector to connect this to the one and only browN/Black wire in the main harness. These should be the only browN/Black wires in the car. See here:
http://mgaguru.com/mgtech/electric/et100b.htm
Barney Gaylord

As I recall,(and it is not all that clear) the short wire to the horn button is bound into the dash loom and one end is connected to the button and the other end has a bullet connector to the main connection
John DeWolf

This thread was discussed between 29/08/2010 and 31/08/2010

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