Couple probrs with 98' Caravan.

hello guys. i installed a new head unit in moms van. well after i did that the passenger window started not to work, we would have to wack the door panel and it would work. well the gauges will do the same thing, the tech, speed, gas, and temp would all die, and if u wacked the top of the dashboard near the dashpanal on top they will come back on and the ABS and Check engine light will come on. what could be the problem? i am going to go out tomorrow and rewire the headunit and see if thats the prob. i hope it is, well ill let yall know and also give me some tips. ive been reading in the fourms on my similar probs so ima give them a shot. well ill let yall know what happens.

well that wasnt the prob. now the driver window is acting up. it seems 2 be a switch prob or something. please help guys i need help.