BRAKES. leaking or airbubbles?

[redSUPRA '88]

my '88 has the stock brake calipers and the rotors in the back are a little warped. for the past month my brake light comes on in the mornings in 2 week increments. so ive just been filling the MC back up whenever needed thinking maybe there are some airbubbles in the lines. however the past 4 days the MC has been half empty or completely dry. thinking its a leak i've been looking for any moisture on the wheels and calipers but i cant see any. i've also looked at the MC itself and the metal lines coming out of it and i dont see any wet areas. if any of u could tell me wat my next step should be or if u know the problem plz post!!

thank you

 

[eraezer]

Get the car up on jackstands. Get a friend to pump on the brake pedal while you look around every single connection in your brake system and feel them to so that you don't miss anything your eyes can't see.
Start with the brake calipers and work your way around the car.

 

[redSUPRA '88]

alrite i'll try that.

 

[mkIIIman089]

Will probably be easier with the engine running (or, only one pump on the pedal) so that the booster is working and giving you maximum line pressure. No need to be wimpy on the pedal either, remember when you really need to stop you're putting a tremendous amount of pressure on it.