Well done!

New switch on steering column was wired in yesterday and normal & bright lights, turn signals and horn are now all working.........FINALLY.

Ordered a new switch for the horn, turn signals & bright lights.

It looks like the purple horn wire is connected to the same location on the fuse box as the headlamp dip switch wire, which is also purple. 

So, one lead of the stalk switch is merely connected to the horn (-) and the other stalk lead is basically to ground (probably still residing in the stock wiring harness and white plastic multi-connector) and the horn (+) is from the fuse box where the headlight dip switch is. 

I'd try connecting a simple light bulb and give it a try. 

Jeg, I will try using the Hayes again but help me a little more. What should the purple/black wire and purple wire (P comes through the firewall near the fuse box) be connected to for horn to work? I see it as the PB connected to one lead on the horn and the P plus a lead from the horn, connected to the fuse box for live voltage. Does this sound correct? My work with electricity on a scale of 0 to 10 is about a 2.

If the previous owners didn't chop up the wiring loom too badly, you probably have the purple wire that was originally connected to the horn under the lip of the bonnet's slam panel.  Maybe it's got 2 wires under there, purple and purple/black - connect them both and your horn should work.  The purple/black is a switched ground; the horn is always 'live' and startles the neighbors when grounded.

A suitable diagram should be in your Haynes -

Thanks. Believe the car was used for racing so horn was removed. The turn signal arm is the level you push for the horn. Will see if I can find the level arm ground when it is pushed for horn. Would it be same ground as for the turn signals (same arm) and turn signals work? Getting what seems to be a simple problem solved is really difficult for me.

The horn itself does not need to be grounded, you should have permenant 12V to the horn and the horn button provides the ground. Make sure that the button is providing a good ground when pushed. I'd suspect the switch in the stork is no good hence the lack of a fitted horn?

Thanks.

Check the ground (earth) connection.

My 1971 mini came without a horn. It has wiring for a horn. Turn signal lever works for turn signals and is for horn when pushed in. Found purple/black wire from horn lever and attached it to the new horn in the engine compartment. Ran the other lead from the horn (horn does work....checked it) to the fuse box and then opposite side of fuse box to power. What am I missing/overlooking to get the horn to work????