Think I have a shot ABS system

[Meklo_4G63t]

I have a 91 GST that I have had for about a couple of months. A month after I had the pressure in my brake system was going to the floor. I notice the brake fluid will go low but no signs of a leak. I replace the master cylinder and bleed the lines. If im right the ABS sits in from behind the MAF sensor. I traced my lines and I have from the the left to right. Left front has good flow and Left rear had little. and right front and side had no flow. I look at the lines coming from the abs and it had flow in one and the slightly one in the other. I need some help please

 

[Ludachris]

How can you tell it has flow? What are you doing to test this? I'm not sure how to tell if a unit fails.

I think I might still have my old ABS unit laying around in the garage if you need a replacement.

 

[Meklo_4G63t]

How can you tell it has flow? What are you doing to test this? I'm not sure how to tell if a unit fails.

I think I might still have my old ABS unit laying around in the garage if you need a replacement.

Man i been looking for this forum....its not the whole unit its the pump it self
I replaced my hydrolic lines and no leak. the problems there