Oh boy, I thought my video would help explain things. Let me try again...
1) All turn signals, in the grill, side markers, rear signals, rear markers, all lights that blink are blinking when the turn signals are turned on.
2) Break lights work
3) Reverse lights work
4) When I turn on the parking lights via the cabin headlight switch (not the headlights!) the front grill lights and the front markers do NOT come on, the rear lights and markers DO come on, they work fine.
5) When I turn on the turn signals (no matter what the headlight switch is set to) all front, rear and markers blink fine.
6) When I turn on the hazards (no matter what the headlight switch is set to) all front, rear and markers blink fine.
7) Turning on the headlights has not effect on the above and the headlights work fine.
Does this clarify what's happening?
Now, there is a ground coming out of the light harness, it's hooked to a screw near the battery. I can unhook it and clean it, splice a piece of new wire and see if that fixes the problem.
The block on the firewall contains two blocks put together, the engine harness block and the front light harness block. The go together so that there isn't any way that I can plug it into the wrong circuit. It fits right into a block that guides it in also.
Rick, I've never "looked" at how the blinkers blinked in the past, I'd say they should be blinking like yours and that may be an indicator as to what might be wrong. Thoughts?