Hi, I have a Snapper riding lawnmower the make is LX1642H. The question I have is why my new seloniod only has current going to three of the four posts. The cables and everything are clean, I cleaned them. This is not even getting my starter to go... the ignition switches works. Nothing happens when I try to start the lawnmower. It only starts when I jump the two posts on the seloniod. Please help

The other side (small wire) of the solenoid needs to be grounded. Are you certain the "new" solenoid is correct for this application and is it wired correctly?