Help! On the road with no turn signals

Do the brake lights work? They are routed from the brake switch THROUGH the turn signal switch to the two rear lamps, so if they work, that proves that "part" of the turn sig. switch is working, the wires to the rear, the lamps, etc, are OK.

If you have power at the flasher, the fuse "MAY" be OK, in that the fuse itself AND the clips. In some cases if you put a load on a circuit, a bad connection can show a test lamp but not operate the heavy load of the circuit itself

SO do you have power at the flasher WHEN THE SIGNAL ARM is selected either right or left?

Explain more, the tests at the flasher? "When I probe the plug" do you mean you had the flasher UN plugged? If so, "no power" at one terminal would be "normal", because the flasher is a series switch.

The red side goes OUT to your column, the pink side is power from the accessory side of the ignition switch IT IS NOT FUSED

Some "alternative" wiring diagrams:

http://www.mymopar.com/downloads/1968/68DartA.jpg

http://www.mymopar.com/downloads/1968/68DartB.jpg

On diagram "A" find the ignition switch. Follow the black wire off to the right, it is your "accessory" and is powered in "run" or "accessory." It feeds TO the fuse panel "accessory buss" AND the flasher UNFUSED. Follow that black over to a splice and beyond, turn the corner at the end and go up to the flasher.

From the flasher, a red goes to the column turn switch

You should be able to probe the individual lines, you should have power at the red from the flasher, key in "run" or "accessory", and power out on the individual left/ right lines

Notice that the 4 way flasher switch is interconnected here. IF all 4 "4 way" works, then all the wiring from the there to the lamps is OK and the lamps are OK. This is starting to look like a turn signal switch problem.

MAKE SURE that with key in run/ accessory, AND WITH the signal switch in either left/ right turn, AND with the hazard switch OFF, that you have power at the red line from the flasher.

One last check would be to JUMPER across the flasher plug. This of course should turn left/ right lamps on "solid" as the lever is moved.