Missing electrical part for Ford e350. on 1993 Ford E-350

I have a 1993 Ford e350 Ambulance with a 7.3 Diesel tourbo Powerstroke.There is an electrical component located to the back of the high-pressure oil system reservois,it is small box with four pins to plug into harnest.What is the name of that part and the part number?

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1 answer
HAVE U CK'D WITH FORD THEY WILL HAVE A PICTURE FOR U