thank you all i will contnue to plug away at it.

If i jump the two wirees at teh dryer and get nothing, if i leave that jumoed and jump the resistor i should get fans correct?

I know that the grey car needs a fan clutch, my concern is why didnt the electric fans kick in. It was almost pegged tempo gauge, and I could tell the difference between the two cars.

We actually were driving both cars home, a three hour trip. I drove black, daughter drove grey. ran into a bad bad traffic jam and grey was getting too warm.

i popped both hoods, and could well the differnece in air movement from the fan, and that the grey was indeed warm.

i could rig this up, but i like things to work as designed

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1993 W124 300D 2.5L Black 360k
1993 W124 300D 2.5L Silver 170k
and one semi retired
1984 W126 300SD 3.0L Blue 200k

SouthWest kentucky near Ft Campbell. If your from the area or know any good MB diesel mechanics in the area let me know.