E30 Brake Lights

Hi.

I have an 89 E30 325i.Intermittantly i am getting the Check Brake light warning come up,but by the time i check the actual lights they appear to be working ok.

I had a similar problem on my E34 535 and it was down to the brake pedal switch,just wondering if my current car uses the same switch and if this is liable to be the cause.

Thanks in advanc.

Mark