None of the 3 brake lights on my 2005 E250 cargo van work. Hazards and turn signals work fine. I have power to and from brake pedal. Replaced multifunction switch. I did drive a staple through a wire or wires at rear of truck, but none appear to have been severed. Both fuses, 10A at position 7 and 15A at position 11 are okay. When brake pedal is pushed, no terminal to the multifunction switch changes voltage. Wire from brake is blue-green, no similar wire at multifunction switch. One staple did blow the #7 fuse, but replacing it and removing the staple fixed the turn signals. Taillights and backup lights ok also. Besides miscalculating on where to put the staples, what am I missing, and how do I get brake lights again?
Thanks
ED