2012 Durastar 7400 with garbage packer. I have lost high idle and throttle advance on packer. RPM module is getting throttle advance signal. Truck sees all the cruise switches, service brake, parking brake switch. Cruise control works. Unpluged the rpm module no change for truck high idle. PTO works, that is the only thing that needs to be on for the throttle advance to be working according to advance logic Any ideas would be helpful at a dead end.
If everything checks out good. I would get the software in the body control module reflashed. I have seen on several occasions odd electronic problems fixed with a reflash.
