I doubt you will ever find a schematic, and even if you did, it won't give physical location, just T's and unions and faucets, and valves, etc. About all I can tell you is red is hot water, and blue is cold water. You'll just have to keep opening access panels and figuring it out. Might take the tub fixture off the wall and disconnect the lines there, then maybe you can pull them back down and make things easier to get to. Don't forget to caulk the fixture when you put it back.
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LadyWindrider
2012 Ford F250 ext. Cab 4x4
2002 Jeep Wrangler Sahara
2008 Yamaha V-Star 650 Classic
2008 Work and Play 18LT
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