95 olds cutlass supreme sl with 3.1 6 cyl. ABS and Brake light stays on. Brake pedal is hard to push but front brakes work. Back brakes don't work at all. Took the brake lines off at the rear caliper and hit the brakes and no fluid came out. Master cyl. is full. Please advise. Thanks.

Assuming this vehicles brake linings are ok and not worn out, it sounds like you have an abs rotor fault. The abs is working while your are braking because it cant read the road speed correctly. So you are feeling the abs motor working.

I would replace the pedal switch..cheaper way to go

Its a faulty turn signal switch.Try this,push down and hold brake pedal while pushing on the hazard switch and if the brake lights come on then replace the signal switch.

You probably have a bad brake light switch. This switch is located on the brake pedal arm or a bracket next to the arm. This switch activates the brake lights when the pedal is pushed. You can check this by turning on your turn signals or warning flasher if your light flash in the rear. Your bulbs are good so this will bring you back to the brake light switch.

Try having someone push on brake pedal at the same time thay move the turn signal lever up and down slightly to see if your brake lights work this would tell me that you have a faulty turn signal switch because GM runs the brake lights thru the turn signal switch so they work if you are driving with your 4way flashers on.

ABS & brake light lit on the instrument cluster ? DTC'S - diagnostic trouble codes stored in the EBCM - electronic brake control module . Your best bet ,take it to a qualified repair shop .

replaced brake light switch under dash, if you don't know how to test don't do anything !

Change your turn signal switch in the steering column 99% sure that is your problem you can some times check by holding the brake pedal down and wiggling the the switch around and have someone watch to see if the come on

led. If it is a vacuum booster, check for vacuum leaks. If it is hydroboost, check for power steering leak.

There is a micro switch at the top of the brake pedal that activates the brake lights when you depress the pedal. This switch likely has to be replaced. Any mechanic can do this in about 15 mins.

door wiring