18 replies to this topic

[KernowCooper]

The original mk1 indicator stalk has no wires for the horn, that was done via a earth wire slip ring and brush in the middle of the steering wheel. The wiper switch you'll have to use the diagram in my document and look at the wiring diagram for your vehicle and work from there.

 

This post shows the wiring colours on the motor http://www.theminifo...ndscreen-motor/

 

And the pdf below shows the 2 speed wiring, between the 2 you should have enough info to get it working

Attached Files

•  wiper terminal connections 2 speed.pdf   34.42K   44 downloads

Edited by KernowCooper, 07 August 2015 - 06:39 PM.

[johnR]

Thanks Dave, I think I've got the wiper sorted thanks to your diagrams now that I only have four wires to cope with.

On the indicator stalk front the brown/black wire goes to the brass slip ring from which I seem to remember a contact wire leads to the central spindle in the column but shouldn't there be a power feed to the column which then goes on to the horn once contact is made by pushing the horn button?  I've got a purple wire and a purple/black wire in the loom that used to go to the horn stalk on the City column, I expected the purple one to be a live feed to the button and the purple /black one to carry the current to the horn once the contact is made by pushing the button or have I got it totally wrong?

JohnR

[KernowCooper]

on the mk1 indicator switch (see below) there is no horn function on the switch, the mk1 had 12v to the horn and then a earth wire came back up through the loom onto the steering wheel, then it had a slip ring and brush and the steering wheel horn push earthed the horn wire out (complete reverse of the later cars wiring) with the horn push on the indicator stalk.

 

Doug here on TMF and others are more clued up on the mk1 column fitting and will chip in with some more info

Attached Files

•  mk1 indicator swt.JPG   27.02K   2 downloads

Edited by KernowCooper, 07 August 2015 - 10:46 PM.

[dklawson]

As Dave said, the Mk1 turn signal switch doesn't support the horn directly.  The horn push button is in the center of the steering wheel.  However, there should be a purple/black wire among the 5 wires loom for the Mk1 turn signal switch.

 

First a couple of notes on horn wiring (without a relay).  The horn is permanently "hot" via a purple wire.  A purple/black wire leaves the horn and goes to the steering column.  There it joins the 5-terminal plug of the Mk1 turn signal loom.  A purple/black wire goes up the switch loom and at the top is directed to the brush that rubs against the slip ring.  The slip ring is insulated from the column.  INSIDE the steering column is another wire that is in contact with the slip ring.  This internal wire passes through a spring and a nylon bushing and finally exits the column with a brass contact tip.  That contact tip rests against a terminal on the center, back of the horn push button.  There is another terminal on the pushbutton that makes contact with the inside of the hole in the steering wheel.  The wheel is earthed to the car via the steering column.  When you push the horn button, that switch completes a path to earth via the steering wheel itself.  In short, the horn push button provides an earth path for the horn, not a power source.

 

I have heard that reproduction switches have used non-standard colors.  The brown/black wire on your switch is likely to be equivalent to the original purple/black.

 

There should be 4 more wires on the switch.  There should be a light-green/brown wire in from the 3-terminal flasher unit's "L" terminal.  The green/white and green/red wires in the switch loom correspond to the right and left side indicators.  Finally, there will be a light-green/purple wire connected to the 3-terminal flasher's "P" terminal.  That wire goes to the indicator lamp on the end of the signal stalk. 

 

If you are going for a retro conversion, you may want to spend some time considering how you will operate the horn.  The Mk1 horn components for the steering column may be hard to find new or used.  I have no idea how you would adapt them to a later column.