Help! I think I messed my brake system up. I put power steering fluid in the brake reservoir and ran it for about 30 mins before I realized it. Now the brake light comes on, but sometimes when I tap it, it does off. The right caliper is locking up on the brakes. What should I do to fix this? Should I get a used master cylinder and calipers?

 

I would take it and have the fluid changed out before you go throwing parts at it.

 

Flush the entire system before you drive any farther, it is no longer safe to be on the road. Hopefully no damage permanent damage was done.

 

Ditto, FLUSH the system.