Upgrade to intermittent wipers
One of the options that comes on "new" cars that I really wish my 69 had was intermittent or "delayed" wipers. This was an available option in '69 but not many people spent the extra money for them. Recently I found a rediculously easy way to upgrade my stock two speed wipers to intermittents.
Installation is generally easier than removing the unit was. I recommend that you test the unit prior to removing your wiper switch.
UPDATE! - Changes required to make washers functional
If you hook up your intermittant wipers and the washers do not work, there are one or two more steps that you need to do. No worries, they are very easy and only require a pair of needlenose pliers & a soft touch.
The original switch is on the left, the new switch on the right. Note the difference between pin outs. To correct this, do the following steps to the connector that goes from the box to the original wiring:
Connector as wired from Ford.
Locking tab on pin.
Connector as wired for washers to work.
Plug the rewired connector back into the car and check the washers and wipers.
* If you have washers before installing the switch into the dash, or prior to installing the knob, but not after then you need to add a spacer (app. 1/4") into the wiper knob. This is because some of the switches have a shorter shaft than others.
* Remember, if the pigtail ground wire from the switch is not connected to ground you will have regular two speed wipers, but not intermittant.