2003 windstar passenger side directional blinks fast but the front bulb and socket work when I swap them with the drivers side.

Did you replace the bulb in the passenger side running light/turn signal socket? There are two filaments in that bulb, one for the running light (which you indicate works) and one for the turn signal. If that bulb (filament) is burned out, it will make the turn signal flash faster. I don't know why you were swapping headlights, don't know where the fire box under the hood is, and don't know what a jumper sore is, so can't help you any further. I have a Saturn Ion, and have never found a fire box or jumper sore in it.

There should two separate bulbs for marker and blinker. It sounds like a bulb is burnt out, bad ground, melted socket or a wiring anomaly. Are you certain it's supposed to have 57 series dual element bulbs for blinker and markers?

check bulbs. if bulbs are good check bulb sockets. I would suspect one or the other are bad.

Try replacing ALL directionals for the side that is not working properly. That fast blink in the back usually means bad bulb, but could also mean bad relay.

Can you elaborate? You say emergency flashers work, but FR directional does not. Does the bulb-in-question light when the E-flashers are going?

Your right rear turn signal bulb is blown.Replace the bulb and the fast blinking will stop.

If you have voltage in the socket with directionals then look in the socket and bend the tabs so that they will contact the bulb. They get hot and pull away from the bulb, rarely, but sometimes the tabs in the sockets will melt and break

could be. make sure they were inserted properly and that you replaced it with the appropiate bulb

This may have more then one bulb in the front or possibly a bad socket try wiggling the new bulb in the socket to see if it will work.Compare all turn signal lights that come on the passenger side to those drivers side.Some vehicles also incorporate sidemarker lights with the turn signals.

This simply means that the front driver side turn signal bulb has failed. Replace it.

replace the drivers front bulb. There are 2 different elements in the bulb 1 for park lights 1 for directional