Okay long story. Bought a 2000 jimmy from a tweaker. Said he replaced front drivers side caliper and front passenger would need replacing. Upon further inspection the front driver side had a front passenger side caliper Jerry rigged into place and a massive leak. Jerry rigged it so it wouldnt leak anymore and bleed that one brake even knowing I needed to do all four. Brake fluid had run out multiple time already. Brakes were decent after I bled front drivers. Got a new drivers side caliper. Took off the drivers side caliper that was a passenger and swapped old passenger with the one from the drivers. Put the new driver side caliper on and went to bleed. No fluid comes through at all on either front caliper( unhooked banjos and pumped still nothing from line) and lost ALL braking power whatsoever. All bleeder valves closed with no leaks and pressure wont build when I pump the brakes. Did not try to bleed back. Did not have time. Checked all the lines that came out of the ABS module and no fluid came out. Wont build pressure with engine off wont push fluids out of abs module. I know theres no leaks as the fluid in the reservoir has not move. My brake light is on on my dash. NOT abs light. Why can't I bleed my brakes?