1984 Engine doesn't turn over

[TBirdCruze]

The battery was low. I believe the contacts in solenoid welded themselves together as it wanted to start as soon as a charged battery was installed and connected it would start to turn over without key in ignition.There was some heavy arching when connected. I replaced the solenoid and now the engine will not turn over at all when I try to start it. Had battery load tested at local auto parts store and they said it was good. But I do have my doubts. Anyone have any ideas of what else it could be? T.I.A.

 

[74 Harley]

You probably have the small wires on the solonoid reversed. One ignites the the solonoid, the other is for the ignition.