She's lucky she didn't fry the ECU. My buddy put a stereo in his Jetta and fried the ECU, SRS sending unit and an ABS sensor. $1350 later, he still had his factory stereo. Next time tell her to always disconnect the battery when doing electrical work, at the very least so she doesn't get shocked. The electrical problem could really be anywhere...if you can wait until Sunday I'll have access to my service manual, or maybe someone on here can help you. It's gotta be a fried relay or broken connection somewhere.