Powermaster Symptom

[buickboy]

I did a search and then went to the TR website for troublshooting. No luck. When i press the brake pedal and then let off, I hear a hissing sound under the dash. No fluid leaks and brakes feel fine. No brake light on. HELP
Mitch

 

[Gary Wells]

Mine did that very same thing for a while before it went out.
Then the brake light started coming on occasionally, and going off again.
then one day the brakes went out and the brake light came on, permanently.
I hope that you have better luck than I did.