Hard brake pedal pm motor not running HELP!!!!!!

[Jpointer87]

87 tr hard brake pedal pm motor is not running fuse is not blown. I searched the forum no luck any HELP.

 

[626gn]

Does your pump run at all or is it completely dead?

 

[Jpointer87]

No it does run fuse is not blown and harness to motor is getting power

 

[626gn]

Time for some diagnostics http://www.turbobuick.com/forums/threads/powermaster-brakes-diagnostic-information.362564/

The most common failures are with the accumulator, leaking check valve, or bad brake switch. Is your brake switch black or grey?

 

[Jpointer87]

Did the diagnostics with ohm meter everything looked good and the switch is grey.Could not tell if the accumulator is bad or if it is the motor don't have the tool.

 

[626gn]

Did you time it to see how many seconds it takes for the motor to shut off and see if it cycles again after a few seconds or minutes?

 

[626gn]

 

[Jpointer87]

Motor does not run

 

[626gn]

Lol. In post #1 & #8 you say motor is not running. In post #3 you say it does run. Which is it?

If your motor is completely dead and the fuse hasn't blown then its either your brake switch and/or motor is fried. Check to see if switch terminals have continuity with each other. If it doesn't, switch is dead. If switch checks out ok move to motor and follow diagnostic steps #3 in the following link:
http://www.gnttype.org/techarea/brakes/PwrMstr.html