Hi I hope that I can help.
I have a question for you though.
Why are you changing the glow plugs? They rarely fail.
The special tool is what Ford Uses, but I have found that a door panel tool works well also.
NOTICE: Do not pull on the wiring to remove the glow plug connector or damage may occur.
NOTE: Only one glow plug connector shown.
NOTE: If coolant residue is found on the glow plug, a new glow plug sleeve may have to be installed. Remove the glow plug.
Thank You and Good Luck