[Shotimes] Brake Bleeding (master cylinder & hcu) Questions

[Heikki Laine]

Greetings.

I have not posted for some time, but a new problem arose with my car so I am
again turning to the experts.  I recently did a brake job, and in the
process managed to let the reservoir go dry.  Now I get the occasional ABS
light, and my pedal feels a bit spongy.  I did bleed the brakes at the
calipers.  I read through the manual and found a bleeding process which
involves bleeding the master cylinder and HCU (I am thinking air got in here
when the reservoir went dry ?) and then performing the standard bleeding
process.  The excerpt fom the manual is here:
http://www.patmedia.net/laine/autos/SHO_brake_bleeding.jpg

Would allowing the reservoir to go dry cause these symptoms?  Can this
bleeding process be performed by a garage or strictly at the dealer?

Any help would be appreciated.  Thanks in advance.

-Heikki
'93 MTX