electrical problem

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I have read this interesting forum for quit a while. So here my first post.

My 71 911 has an electrical problem! The problem started after bleeding the front and rear brakes.

When I use the handbrake the turn signal indicators are on and the blinker flasher is making a buzzing noise. Also during driving the problem comes and goes. The turn lights, brake lights and other lights are all working normally. I did not yet tried the reset button on the master brake cylinder.

I do not understand why the turn signal indicators and blinker flasher are on, if the brake warning switch is the problem, because on the electric wiring diagram of 911 T there is no connection to the blinker flasher and turn signal indicators in the tacho. There is only a connection form the brake warning switch and hand brake contact to the e-brake warming light in the oil temp/pressure gauge.

Does anyone recognize this problem?

Thanks!