i have a 2009 ce bus with wabco hydraulic brakes I am having a problem with the parkin brake every once and a while the service parking brake light comes on along with the abs light trac light when I pull codes there is one for park brake over extended I pulled drum the shoes are really good so I tried adjusting them and it still comes back every once and a while also there are to codes for the j1939 one says something about there my be three resistors and the other says one may be missing has anyone here of this I check one resistor on side compartment where fuses are that one is good don't no where the other is