What and where is a wcm

What is your question?

2000 Jeep gc. After 3-4 days of sitting battery is dead. Brand new battery. Today it went click click click then started.sometimes it starts fine and sometimes it's sluggish and sometimes it's absolutely dead. Started about 3 weeks ago.been reading about a wcm. What & where is it?

What makes this problem better or worse?

Nothing

How long has your 2000 Jeep Grand Cherokee had this problem?

Three weeks