Resetting the switch combination valve (put a catch tray under it and it would help to look at the exploded view from the TSM) should do the trick as long as you don't have a hydraulic problem. If you can't find a leak and the light comes back on, chances are the master cylinder is bad (which could also be why the rear brakes lock up before the fronts). Matt At 07:59 AM 8/14/2006 -0700, you wrote: >Question for the smarties out there: > >My AMX's dashboard brake light is constantly lit. When I apply the brakes >hard enough, the rear wheel locks up, really a bit dangeous. There's no >leakage of any brake fluid at any of the wheels. What caused this to >happen? Should I reset the piston in both the engine compartment valve, >underneath the heater motor, and the rear brake proportioning valve, or >replace both, or what? > >Thanks for the help, > >Steve >_______________________________________________ >AMC-List mailing list >AMC-List@xxxxxxxxxxxx >http://www.amc-list.com/mailman/listinfo/amc-list > >or go to http://www.amc-list.com mhaas@xxxxxxx Cincinnati, OH http://www.mattsoldcars.com 1967 Rambler American wagon 1968 Rambler American sedan =============================================================== According to a February survey of Internet holdouts released by UCLA's Center for Communication Policy, people cite not having a computer as the No. 1 reason they won't go online. _______________________________________________ AMC-List mailing list AMC-List@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list or go to http://www.amc-list.com