Maybe its just been bad for a long time.
Try replacing the one but be prepared to do the rest too.

Im assuming you have confirmed your wire to #3 is good.

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."