You’ll get this side quest by talking to Tyrone Sandes in the Evangelical Church. He’ll ask you to find a way to contract some chills and cold in order to test your faith.
All you need to do is CAMP OUTSIDE and you’ll get chills.
You’ll need a SLEEPING BAG for camping outside.
NOTE: There is a sleeping bag in your toolbox. If not, you can buy one.
Return to Tyrone Sanders after contracting chills to finish the quest.