I have replaced both rear wheel cylinders/brake lines to rear axle, all new emergency brake cables/both front rotors, shoes, calipers, and rubber line from calipers. Both master cylinder and booster. I bench bleed master, bottle bleed, the whole brake system six times. I do have a new ABS pressure modulator switch on the way. Brakes are great before starting truck. Once truck is started if you press the brake pedal pedal sticks to the floor. I have disconnected the ABS, fuse and wires to no difference. my guess is air in ABS. the kicker is, I can hook up code reader/scanner to aldl and nothing. it powers up and say everything is good and I know better. even tested the scanner against another vehicle. it works properly. I am looking for an aldl pin out wiring diagram so I can make an attempt to read adld to diagnose ABS. any suggestions other than slamming my hand in the door?
Dec 30, 2018 at 2:00 AM
