Help with no headlights. 1974 scamp. Blinkers come on instead...

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Not stumped. It's more like you're shotgunning, hoping to hit something.
For blinkers, look at the other guys thread about blinkers for how they work.

So with my cluster out entierly, and the 2 ammeter wires tied together, my blinker issue persists. U would say that eliminates the headlight switch...
This means nothing. All you've done is removed the gage that tells whether current is flowing out of the battery.

With the cluster out, and the dimmer switch unplugged, the dimmer switch plug has grounds on the outer.
This may get you closer. The connector outers should go to the headlights first and then to ground. It should show ground with the resistance of at least one filament.
I see in the diagram that the driver side bulkhead has several headlight wires running through it.
Yes High beam and low beam.

Am i dumb to assume "red" is hot on that plug...so sending power to that wire should turn on the lights?
Not sure which plug you are looking at. If you're looking at the hi/low, according the the My-mopar diagram, red is high beam. Its probably right, but you can check the shop manual or just look at the stuf you have pulled and see if it makes sense.

Yes, have dome light.
OK.
 
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Maybe this will help.
This is a general scheme of the some of the wiring including the two feeds to the headlight switch for the headlights.
B1 is the terminal for headlights. Just the headlights. There is a 15 amp circuit breaker in the switch.
B2 is the terminal for the power to feed the parking lights, etc.
upload_2019-4-19_8-31-49.png

(insulation colors, wires sizes, etc, vary depending on year and specific options.)
 
If the switch doesn't send power out on the green wire, the circuit breaker inside the switch can be the fault. They typically cycle the lights on and off several times before failing completely. If there is a short somewhere, like at the bulkhead connection, that circuit breaker could turn the lights off faster than they could flash on.
I experienced circuit breaker failure before, headlights going off and back on at random, but don't recall it produced audible click. Its buried inside the switch so probably not.
 
So i pull out the headlight switch, and i get no headlights. But...front markers come on,
This may be super obvious, but worth mentioning just in case...
Headlight switch position first click out is parking lights only.
Pulled 2 clicks out is headlights pluss parking lights.
Rotatating the switch in position 1 or 2 will dim the instrument lights.
Rotating the switch until it clicks will turn on the dome light.
 
Well all...i am almost embarassed to post, but want others to see in case they come across this problem also.

The ground on the radiator support was bad.
I had checked it numerous, and even the pressure from a test light would make it read ground. It was only after i bumped it that i heard the flasher unit blink once that i figured it out. I cut off the eyelet and ran it all the way ti the battery ground with a longer wire.
Got all lights, blinkers, everything back.

Glad i found it. Quadruple check grounds!!!
 
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