Sence you have the relay clicking and dash lights flashing you can use these things like a tool, turn key ON, and wigel dance the wireing, listen for the relay clicking, the light flashing, feel for a warm spot also.(resistance)
My vote , connections
TIP: If your car ever drops dead while driving you get about 1 chance to use the brakes before vacume is used up. Turn the eng over and vacume will return even though it wont start, at least it will help stop.
This works well when draging a car home with a chain to.