1996 land cruiser. brake fluid is leaking under passenger side door near the front. Could not see where it was leaking from. What is around there, is there any valve or connection that could be leaking. Looks like it could be under the heat shield at the bottom of the firewall on passenger side. I assume it is the brake lines going to the rear, are they routed on the passenger side. I could not get under there to really look, it is an hour from my house at my son's house. So when I go to fix it I want to be prepared with the right lines and supplies. If it is the line to the rear how hard is that to replace.