Cranking problem

I own a 2002 7,3 Excrsion.last month i have problem to crank the engine.I am sure it is a electrical problem.
I have taken out the starter motor and it is ok, and the solenoid on the starter is ok.
Vhen I turn the ignition key i can feel the solenoid on the starter engage the gear,bur no turning of the starter.Have bought a new starter,but the problem is the same.I have cheked all battery terminals,and wiring conectors.I have 2 new batterys.Do anyone know if there is a nother starter svitch/solenid other than the one on top of the starter motor?
I live in Norway and there is no garage near me whith any experience whith us cars.
My car have 90,000km on it.Never had a problem before.
Then after 5-6 starts it is more and more difficult to start the engine.Now it wont start at all.When a friend turn thev key and I hold my hand on the startermotor I can fel the solenoid engages the startergear,but the startermotor do not turn.Wil chec voltage on the red cable conected to the startermotor solenoid today.I belive the problem is in this cable,between the battery and the solenoid on the starter motor.
Is there another relay/solenoid betwen the battery and the startermotor?
2000-2004 Ford Excursion Starter Solenoid - Engine Electrical - Standard Motor Products 00-04 Excursion Starter Solenoid - 5244-07069625 - PartsGeek
After a start up everything seems to be normal.
Thank you for all answers,and by the way:There is no extra starter solenoid on my passenger fender.





