cummins industrial tools electric hoist #6832 (model #HGS220/440lb)?

i have a cummins industrial electric hoist #6832, HGS220/440lb, HR930, serial #04GM07HY. my wife accidently pulled the control switch out of the motor. the cord contains 4 wires (blue, white, brown, black), there are 2 molex in electric box which only have 3 wires missing. the red wire which goes to the motor has a wire going to it, and looks like the 4th wire from control switch was pulled out of there. the problem is, i don't know what colored wires go where. this lift is my only way of getting on/off of lawn mower, being i'm in a wheelchair, grass is getting high. any help please.