Brake Bleeding & Possible ABS Unit Failure? (archive)

Well, I have traced the brake line all the way to the left rear drivers side. Started to check for fluid at the junction (behind the differential), no fluid going to the (L) rear. I cannot bleed the left rear caliper (no fluid coming out). The right rear bleeds, but w/ not much pressure. There is NO blockage from that line going into the L/R caliper. So, I traced the brake line all the way to the proportioning valve, still no fluid coming through. Followed the same line into the ABS unit. Loosened the line on the actual ABS unit itself, and NO fluid from the ABS unit, at all..... This is the line that faces the front of the car & has "h" stamped into it, above where the line feeds into it. Does this mean the actual ABS unit itself is shot? I have bled the ABS unit (all the other lines coming out of it) & this "h" one is the only one w/ NO fluid at all coming out.

What do you guys think? An internal blockage inside the ABS unit? Is there a way of trying to "free" it or blow it out? OR do I just need another ABS unit?

Keep in mind that I bought the car (needing brakes). So, I have never known if the ABS has actually fully worked or not. The brake pedal would go ALL the way to the floor, hence the installation of the new 25mm master cylinder & s/s lines...

ANY HELP or pointers would be GREATLY appreciated:)

TIA-

Don
88 ///M3
Ft. Lauderdale

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