I assume it is a brake switch or the plug came off the switch , I have not looked yet so I assume there is a plug going to the switch under the dash where the brake pedal is , any other places to check if you have no Brake lights , the bulbs are good and all other lights work.

Fuse or turn signal switch. Just because the turn signals work doesn't mean the part of the switch the brake lights go through is good.

Or the Hazard Flasher switch on the dash as well.

Sequence is....Brake switch by Pedal to Hazard to Turn signal switch to rear lights. Course check the fuse first.

Turn signals are notorious for that happening, got a 68 SF here with a bad one right now.

fuse did it for me once too.
looked good, and didn't bother to check further. Was about to rip the column apart and decided to replace it just incase and voila, lights again.

Pull on your hazards and if they flash OK then from the electrical connector coming out of the steering column rearward you are good. Start with: check the pink wire @ the pedal as it should be hot all the time then the pedal switch for continuity when pressed then the white wire that goes downstream on the other side of the pedal to the above connector see if it(the white wire) has fire when you press the pedal and w a circuit tester (they're cheap) w the alligator clip on a wire (connect alligator clip to ground) stab the pointed end into the electrical connector w both halves still together and w the pedal down the white wire should have fire and two wires a dark green and a brown have fire as these are the 2 "out" wires to the brake light large filaments. Check these in order until you find the "open". If the hazards do not work seperate the connector and jump fire to the aforementioned brown and dark green wire in the body half of the electrical connector and see if the brake lights work & if not work downstream until you find the "open". There are several connectors from the column rearward to the sockets and check that the sockets are grounded but most likely they are since both are not working and they probably would both not lose their grounds on opposite sides of the car at the same time.

Thanks again for all your Info , I will check them out.

OK I finally got to check everything out , flashers and turn signals work on the outside / rear lights blink , no dash arrows are working though , no brake lights , any more Idea's? thanks.

TS switch or brake switch.
The fact the lights work proves out the (working back) bulb grounds, bulbs wiring to the TS switch and parts of the TS switch.
It also proves the power into the TS switch, and the hazard and TS flasher and circuits.
The stuff that isn't working break down to:
1. dash indicators. The rest of the circuit is working, so either the output to them is bad, the bulbs are bad or the ground is bad.
2. Brake lights. The whole circuit is working for the flashers, so it's either the power to the brake switch, output to the TS switch or internal in the TS switch.

Check the brake switch as detailed above.
Constant power on one side, power to the other when the pedal is pushed.

Check the power at the bulb in the cluster if possible. There should be on/off power with the flashers on. That should narrow the focus.

So if the Brake Light Switch is Bad the Turn SignalArrows on the Dash will not light up / blink ?

The turn signal switch !!!!! Brake lights work thru the turn signal switch.As a Dodge dealer tech in the sixties & 70's I replaced them weekly..

Yes and so could bad bulbs in the dash and a bad ground on the dash could cause them not to flash also.

pull apart the turn signal harness coming out of the column and jump fire to the tan and light green wires & see if that lights up the dash R & L indicator lights respectively

Thanks for all your Info , I will do some checking.