Hyster S155XL2, Ser# C024V02936E. we have 4 of these machines and one has a electrically activated shift system which isn't working. It has a module #8530585 R2, you need to step on the brake to activate the shift circuit. There is a red LED on the module that is not on, it flashes when you key on, the power and ground circuits are tested and good, i can power the shift circuit by jumping the module plug power to the switch power terminal (term#2 - term#5). The brake lights work. The park brake start lockout system works. What I would really like is a wiring diagram, any help appreciated.