Well, Im 600 mles from my car and am without the books, but I have ideas to trace the source!
(wish I was with my car, I'd go play)
Now, I'm thinking that if all was well and one of the connectors (brake fluid sensor or park brake switch) were disconnected, the red warning light would come on. (or off? Anway, something will happen)
So, onto my theory:
If he were to disconnect the fluid level sensor connector, then bridge it's pins, that would turn the light off (or on?), if, that was the source of the problem.
Same deal with park brake switch.
Anyway, something should happen if either problem connector was bridged, yes?
So, basically, whichever connector you bridge that solves the light, the problem is in that area - likely fluid level senor or maladjusted or faulty park brake switch. (mines was a badly adjusted park brake switch that with the slightest touch of the park brake pedal, would turn the light on and off)
Make sense?