Won't shift out of Park
Revived RV for spring and it will not shift out of Park with engine started, foot on brake.
To troubleshoot I disabled the drive shaft parking brake (removed linkage, which was free). Discovered that this model (Oshkosh X-line) has hydraulic actuator to apply this brake. A valve assembly is mounted under the actuator cylinder but I can't figure it out from here. Manual says: "The parking brake is applied by means of a control valve activating a relay valve which activates the spring-set parking brake chamber. The spring brake chamber pulls a cable engaging the drum brake on the transmission drive shaft."
I'm lost where to look next. The Shifter on the dash has two cables, one goes to the transmission, the other to where? Its not easy tracing these things!
Some other problems this spring: alternator not working (repaired); engine fuel shutoff solenoid stuck (repaired); ignition switch failed (apparently, instrument lights stay on requiring fuse removal and re-insertion to start engine)
Any help appreciated.
Oshkosh XC18RD chassis
Tiffin Allegro Bay Pusher (1994)