Lull 644b-37 having electric troubles

I have a 98 lull with jd non turbo 3 speed transmission. I'm having trouble with rear oscillation lock. With boom down and both proximity sensors working my transmission is in 3rd gear. If I raise the boom until that rear osc flips of then I can shift from 1st and second gear. I replaced both sensors and are opening and closing as usual.according to the jlg parts diagram there is a couple Osc relays and trans ecu. But I have no idea where on the unit they are located. I got into circuit board and found nothing wrong or related to the problems. Anyone have related trouble and or advice thanks

Lull 644b-37 having electric troubles