I have an ongoing problem with my 2001 Jetta GL. Whenever I step on the brake or turn on the heater, or roll up the window or anything that pulls power, my lights dim momentarily. I realize that is common, but it is a noticeable amount of dimming. Also, I can sometimes cause enough load, like when I power the window up and hold the button for a second, so that the ABS light comes on, the BRAKE light illuminates on the dash and I get three successive beeps. Sometimes the beeps will repeat continuously and sometimes it stops after the first sequence. Sometimes I have to shut the car off and restart it to get it to stop. Anyone ever hear of such a thing happening?