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MG MGB Technical - The Horn

This is on my 77B. Ok my horn is not working ( never did for me).I tried coneccting the horns with a short wire directly to the battery one neg and one positive to each connector and nothing happened. OK so I buy two new horns and do the same test and they beep. I reconnect them to the car and nothing happens. I put a test light on each wire, one is always live and the other must be a ground. When I connect them to the horn and place a test light on each connector they both light up.This is about where I dont know what else to test. Could it be a bad relay? (where is the relay?) a bad horn button? (How does this come apart?)Any help would be greatly appreciated. Oh by the way it looks like on the passanger side connector the ones with two wires each the positive side one may have come into contact with a ground because the plastic connector is partly melted. Thanks
Dave Noe

Look on the main MGB Technical page with all the threads listed. On the far left is a link to Electrical Help.
There you will find: http://www.mgcars.org.uk/electrical/horn.html
Sounds like a ground problem.
A.K. Blackley

A.K thanks for the link it really helped. I was able to track it to the horn switch its self. But now I have another problem. How the heck do you remove the cowl around the steering wheel to get to the switch. I see three or so holes on both sides but have a really hard time seeing anything in the left side. on the right a flat head screw driver fits in but dosnt seem to turn easily and I dont want to break anything. Well any way someone must know off the top of their head. Please help if you can.
Dave
Dave Noe

There are 4 screws altogether, 2 that hold the 2 pieces together, and one on each side that holds the cowl to the steering column. It's either Phillips or Pozi-drive, I don't remember off the top of my head which, but a Phillips will probably work. You'll need a short stubby handle on the two closest to the dash. They're difficult to get to, but not impossible.

Paul K

Dave,

The design of that horn button is terrible, mine failed the same way a couple of times, and I finally gave up on it and replaced it with a push button I bought at the local car parts store. I drilled a hole under the manual choke handle and put it there.

CW
CW Strong

This thread was discussed between 25/01/2004 and 26/01/2004

MG MGB Technical index

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