I have a 2000 V70 XC. A few months ago the brake sensor light would flash occasionally when I applied the brakes. Per advice from brickboard, I replaced all of my brake lights in case there was some corrosion on the contacts and it seemed to fix the problem for a week or two. Now, every time I apply the brakes, the sensor light comes on and remains on until I take my foot off the brakes. I have confirmed there are no bulbs out. Is there anything else I can do, like wiggle some wires? It isn't a problem driving the car, it is just very annoying. Any advice?

If the brake fluid is low, the sensor light will flash. If a bulb is out, the bulb warning light flashes. Do you have a fluid leak? I believe the sensor switch triggers a light when half the reservoir is low causing uneven pressure between the front brakes and the rear. If this is true, you may have to bleed the brakes after filling the reservoir.