Wierd turn signal buzzing Options

[flat4]

Hi All, the turn signals on my rebuild seemed to work OK for a while. Now they are not. They work fine with either signal on, or the hazard flashers. When off there is a buzzing from the relay and the brake & turn indicator warning lights are always on, but a bit dimmer than normal.

I disconnected the column stalk and the problem is still there.

So I went back to the last thing I fixed, which was to put bulbs in the various indicator lights and put them back in the correct holes in the gauges. Lo and behold the problem only occurs with the brake warning bulb in. For now I've taken it out so I can fix the rest of the issues on the car, but I'd like to get to the bottom of it and have the warning light back before driving on the road.

Why does the brake warning light come on with the turn signals (flashing in time with the turn indicator)? I assume it is meant to, or is this a problem?

Any ideas?

Thanks, Steve