After steer rack replaced-brake problem

[Myke456@aol.com]

Any suggestions on the following:
Just replaced steer rack, 87 5k TQ, work done by reliable backyard
mech/friend. Finished job as he left to go away for 10 days. Problem-brake
warning light flashes a few seconds then stops while driving, seems about
15-30 seconds after using brakes. I'm confident he'll know what to do when he
returns, but I thought I'd see if anyone who's done the job has had a similar
experience, so we could give him some direction in case he doesn't know where
to start. The pedal seems just a little low, but I haven't driven the car in
about 3 months. Pads and brake fluid are good, all operating fine before
replacement. Do the brake and steering systems share any components?
Thanks
Mike
myke456@aol.com