I hope it is not inappropriate for a non-Reatta owner to make an appearance here to seek help regarding the brake system. I just inherited a 1990 Cadillac with minimal mileage (32K miles to be exact), the electric/hydraulic brakes aren't working right however.
I searched the archives and read through a lot of material on the Teves Mark II system, my symptoms and the context are somewhat different than the norm.
The car just came out of storage, over 3 years in less than ideal conditions. The brake booster looks brand new, but the pedal is rock hard. With a lot of effort, I will get minimal braking force, although I only pushed the car around, I can't tell how the system behaves at speed. I haven't yet tried to turn the engine (I want to empty the fuel system before this) so the full self-test detailed on reatta.net isn't possible for me at this point. I believe the hydraulic pressure system should be triggered with the key turned to ON, yet it doesn't. I understand that the hard pedal means there is no pressure in the system.
I unplugged the electric pump and ran 12V into it, I can hear the motor is turning, but I can't be sure it's working normally. My first question is this: when the pump fails, does it normally fail altogether, meaning it stops turning completely?
I'm tempted to think the problem is electrical (either relay or pressure sensor), but there are so many components to this system I'm at a loss finding out what's bad.
Suggestions of things to try before I buy an entire used assembly (last resort because mine looks brand new, I'd rather find the one part that's failed) would be greatly appreciated.
Short of doing the full self-test, any other test I could do to provide more clues?