Morris Minor Owners Club

I have good power coming to the horn, and I popped off the button on the steering wheel, and it looks fine...
There are four tabs on the horn itself, and I only have two wires, I'm assuming one positive and one ground...er..earth. They're hooked up diagonally from each other. How can I test the horn? I have a double alligator clip rig.
Thanks!
Dave

The purple wire is the supply and the purple/black goes up to the horn button and then via the horn button to earth/ground.

If the wiring is original, the purple is a 'permanently on' supply, so test there is 12v at the horn terminal. If OK, to test the horn, connect the terminal with the purple/black wire directly to ground. If the horn works the problem is with the wiring and/or the horn button on the steering column.

An ordinary test with a meter will show both wires to be 'live' - so do exactly as Richard describes above.

O.K. Did the test, pulled off the purple/black wire and connected an earthed wire to that terminal and no honk... here's a pic (before test)

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And is there power at the purple wire??

The terminals on the horn need a real good clean, back to clean metal before you condemn the horn as" past it's sell by date ".
Good connections first and then test.
Bob

As a final check, connect the voltmeter to the purple connection and ground the purple/black - do you still get 12v at the purple connection? If there is still 12v at the purple terminal, good clean contacts and no horn if you contact the purple/black contact to ground, it sounds like the horn is no good.

Sorry- should have said- yes, good power at the purple lead. As the pic shows, the horn is very dirty, so I'll clean those terminals and test again.
Thanks, mates.

The four spade connectors are for wiring a pair of horns in parallel

IslipMinor wrote:As a final check, connect the voltmeter to the purple connection and ground the purple/black - do you still get 12v at the purple connection? If there is still 12v at the purple terminal, good clean contacts and no horn if you contact the purple/black contact to ground, it sounds like the horn is no good.

So, I did all this... I'm gonna pull the horn out and test it on the bench. Can i hook up a 12v lead and ground a lead to test it out of the vehicle?

Also- if/when I get a replacement horn, can I get any horn to work, or will I need a seperate horn relay. Do I need to buy a Morris Minor horn?
Sorry for the dumb questions...

Dave

Original Horns look nicer , and from my 1964 I get a great 'Parp' and from the larger 1960 a good , deep 'Beep'. But I have found horns to be trickey, needing a good bit of electric (12v) through them , often direct from battery -> Horn -> Ground. This gets the diaphram moving , its probably stuck if not been in use of in poor weather conditions. Off vehicle I think it can be adjusted via the slotted screw head. If still no life then any 12v supply horn/s ( air horns , what ever physically fits ) will do the task of warning persons or other cars.

I am having problem with my horn.

The horn is on the turn indicator stock with the light.

The indicators work in both directions now.
They had a problem too.
The two fount buckets that hold the bulbs were so rusty there was water lines in the bulbs.
After replacing the sockets & bulbs the turn indicators work on all four corners.

The horn will not work when pushed in like it should.
I do get a little sound from the horn when i use the turn indicator in either direction.
I think this indicates the contact for the horn may be dirty.
I have checked the ground on the circuit. It looks fine.
I touched it with a test ligh to power & it lit the bulb.
Not sure if that means the groud is ok - but i could not think of any other way to test it.

Is there a contact to clean or is the ground the problem?

As always - Thanks for all your help & suggestions.

Vigil