All done lights flash on and off and the turn

You may want to check the wires before the connector with a test light...don't trust the socket just because it looks good...I had the same problem.

Quick Brakelight/Turn Signal Replacement - Ford Edge ...

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Apr 13, 2013 - Uploaded by VehicHelp Quick Brakelight/Turn Signal Replacement - Ford Edge/Lincoln ... Anyone else see that these bulb sockets in the 2008 Ford Edge are burnt?

replace the right rear bulb. the quick flashing indicates a bad bulb. it could be a wiring problem to the rear for the signal light that you will have to check out starting at the socket and working forward.

Rapid flashing is generally down to a bulb being out on the side it effects, due to the resistance being altered, does the side repeater and the front flasher flash fast as well? Try changing all bulbs on that side

could be a bad earth or ground on the rear light clusters

Yes - the fast flashing is a warning that a bulb is burned out. Change the bulb (be careful to put it in the same as the old one as it probably is 2 bulbs in one , parking and turn/stop) and you should be fine.

check all your fuses under dash and under hood even if the light is flashing the bulb may have a damaged filament causing the flashers to work rapidly

This is the indicator to tell you that either the front or rear turn signal bulb for the direction that blinks rapidly has burnt out. To test this, place the car in park and engage the rapidly blinking turn signal (the engine does not need to be running). Step out and look at the turn signals to find the culprit and go to the autoparts store to buy another (if you have the money, you should just replace both as the other may go out soon).

It's the bulb. There are two filliments in the bulb. One is for when you turn your lights on and the other is for breaking and blinker flashing. When the break filliment goes bad it causes the blinker to flash very rapidly. 100% the bulb. Change it and all will be good again. P.S. if it were a fuse none of the break lights or blinkers would work.