Need wiring diagrams

Help please. My sis has a 91 DOHC Storm and the running lights do not work. The headlights and brake lights work but thats it. We have a feeling that someone may have crossed a wire or something while installing a stereo. The lights worked when she first got the car but then one day, nothing. If anyone has any diagrams, where to find them online or has an idea of what may be wrong your help will greatly be appreciated. We are going crazy! :banghead:

check out the auto zone website. they have manuals online including wire diagrams.