i have a 2004 s10 4dr, the problem i have is my passenger side window switches aren't working. but i can roll them down from the driver side swtches. i checked to see if the switches had power to them and they did. how can i check to see if the switch it self is bad. if and body could point me in the right direction on how to fix my problem or tell me were to find wiring diagrams that would be great.