'00 sable electrical issue-no start
hoping for a little help with this one. My dad has a 2000 mercury sable that has sat for awhile, I go to start it (brand new Battery) and nothing happens at all. The dash lights are all on, but I get no response when the key is turned.
I have tried sanding the ground wire and the contacts on the starter and the solenoid, but still have had no luck. What could be the issue here? Could it be the transmission switch that says its in park?
Any help or suggestions are greatly appreciated.