Hi Brian
I did check to make sure the bulb was good- have seen that problem before(bulb looked fine, but the filament was actually broken and sure enough it would move if you thumped it).
Then I took a straight pin and probed into the wires before the connector- no power.
Lastly checked the hot wire to ground- no power and then the ground to known power and saw that the ground was good.
That is why I think that the problem may be with a switch or relay. The other side works correctly.
Oh well, guess I will have to break down and get a service manual (after all these years) to see how this circuit is configured.
Thanks for the reply
Fred