Brake problem

[jafco13]

I have a 1995 Nissan Altima GLE with 153,000 miles on it. I have been having a low brake and thought maybe it was time to change the (front) brakes as I had changed the master cylinder approximately 6 months ago. I changed the brakes and still hardly any brake. I have bled the brakes several times and still not a good brake now the brake light is on which I've never seen come on even when the master cylinder was malfunctioning. Anyone got any ideas? Back brakes? Maybe even the master cylinder replacement again (it may have been a refurbished part; not certain)? Thanks for any help.

[nismopu]

How are you bleeding the brakes? Also, is your rear brakes wet or look like they have more road grime buildup than any of the others? You could have a leaky caliper thats not super obvious. peace.