I had my battery tested. It's only about 3 months old and it's fine. Guy from triple A tested it again yesterday morning. He got her started and I drove home with no problems. I parked in my garage as usual, turned the engine off took out my key and then attempted to start her again. "CLICK". ,Welcome to the forum @krazykaron. When you have a chance, head over to the Newbie Section (<click this) and say "Hi".
Tell us a little about yourself and your ride.
That way we can welcome you all proper like.
K1 is actually a relay. It is Run/Accy.
If it is just clicking, I'd check the battery voltage and the cables & connections.
Before doing any work on the Nitro, disconnect the Neg (-) battery cable, isolate It, and wait 10 minutes!
This will allow time for the airbag capacitors to discharge.
You don't want to have your airbags go off accidentally.
It has already happened to a few members here...
Always disconnect Neg (-) battery cable first, then Pos (+) battery cable. Reconnect Pos (+) battery cable first, then Neg (-) battery cable! This sequance is VERY important.