Last year I posted about the fact that my turn signals and headlights sometimes don't operate unless I turn the key slightly back in the ignition, and someone advised me to replace the electrical part of the ignition switch, I finally got around to ordering that part and going to do this in the morning... ut do I have to disconnect the battery first? Here are the directions (which do not mention the battery)

http://volvospeed.com/Repair/ignit_switch.php

Also this morning for the first time, the key actually spun all the way around before catching and starting the second time around. Now I am worried that more is wrong with the ignition not just the electrical part - should I order another part? I hope it starts when I leave work today...