I have a troybilt 42" riding mower model 13an779g766 3 years old The battery was unable to start mower I replaced it. The new battery full charged did nothing I have check power to key switch its OK. There is no power to starter I have jumped starter and it works. The fuse is OK.If the only one is by key switch. Note Lowe's did not have a manuel for this model.Seems like the unit is no longer grounded.Note the starter has only a positive hook up direct we grounded to the block to check starter.also the head lites do not come on when switch is in on position. Any Help? bluetobee@aol.com T Y Don