Jim, when you state "unplug the 2 rear connections " I assume that you mean the connections at the flasher? I notice that the front flashers work but seems pretty slow. What is confusing me is that prior to installing the flasher the brake/parking lights worked and I didn't have a specfic ground to them. Clearly I had current to the rear lights prior to installing the flasher.
Thanks for input, I will unplug the rears and see what happens.