My power window in 87 bmw 325i

when you pulled the f use pannel there will be a guild on the reverrse side of it that will you tell you which relay it it is i imaginge its under the hood and yes, if water get's in via moon roof it can reek havoc on the elevtrical system....Pray its a fuse/relay and not a shorted out motor relay internally on the power window motor....But check your fuse replace any that are burnt and for the p-w relay you just have to change it unless you have some one try to push the window button and you have yer ear close to the relay to hear a slight click, if you hear something and nothing happens then its a short between thee and controlls if no noise replace and go from there....Best wish's