1990 5 spd Thunderbird super coupe , owned for 25 years no problems. Today brake power assist failed, came back on after turning around to come home.. Fluids check okay. Afraid to drive, what needs replacing?
If you're talking about the factory ABS, see: http://www.sccoia.org/articles/anti-lock-braking-system/
Could be one or more of these:
- accumulator
- ignition switch down on the side of the steering column (not the key cylinder)
- relay(s)
- pressure switch
Good luck getting one for $80 today