Cold Weather... Main Relay?
 

So i have read about hot weather messing up the main relay. but what about cold weather? It is -2 ish (celcius)... its snowing, and now my car wont start/turn over. When i try to start it i hear really fast clicking... right from were the main relay is. im assumingn thats it... so im heating my car up right now... using a really hot halogen light.. haha. im gonna see if that fixes it. any suggestions?