To start off, I will say this car was a project purchased from someone else. It has an iron block 6.0 with LS1 heads and a TSP MS 4 cam. The engine harness was melted and while I waited for the harness to be repaired, I replaced all four corners with some Wilwood calipers, rotors, and braided lines. I put a new harness in and everything was running smoothly. One day, after driving the car for about 40 minutes or so, I noticed that the brake pedal had no pressure and went straight to the floor. At the same time I noticed that my signals were hyperflashing and the front turn signals did not illuminate. I changed my master cylinder due to the pedal going to the floor and bled all 4 corners and there was a lot of air in the system. Once I bled the brakes for close to 2 hours to ensure there was no air in the system, I took it for a test drive and the pedal still went to the floor. I finally noticed with the car off and the key in the ignition that my ABS module was pulsing as if it was under load. I pulled the fuses for the ABS module to see if that was causing the issue with the brake pedal going to the floor. I haven't bled the brakes since pulling the fuses, but has anyone else had this issue before? I'm definitely confused as to why both of these issues would happen simultaneously and out of the blue.

 

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