Replaced Turn Signal Switch - New Problems!

Maybe this will help with your troubleshooting. Make sure wire colors are in the correct cavities (middle left of the diagram): [ame]http://www.70duster440.com/DashHarness70%20Page%202%20and%203.PDF[/ame]

The other half of the diagram is here if you want to see it: [ame]http://www.70duster440.com/DashHarness70%20Page%201.PDF[/ame]

Also, testing the column wiring: http://www.70duster440.com/images/Column Wiring.jpg

I'd be looking for any hackery in the dash harness by previous owners.