Randy the two wire flasher is a thermal device

[godfire]

Randy,
We were correct at the wrench party.
You don't use the ground wire when going to the heavy duty (two terminal flasher).

The new device works off of heat.
When it heats up it breaks the circuit, when it cools down it makes the circuit. (or the other way around)

Good luck and if you need help we can do it next month at the wrench party.

Now go and enjoy a french fry! 

[BuzzKill]

Ha!  Thanks for double checking for me though.  I'll try to get that done tomorrow.  Preciate all the work from ya'll.  Thanks!