HP-65 card reader - purpose of WE pin

[albertofenini]

Quick question...
Would it be worth measure the resistance of the heads ?
Just to make sure the magnetic head is ok ?
And if yes does anyone knows which values should we expect and between which cables should it taken the values ?
Looking at the schematics I would measure between the yellow and red and between the orange and blu as these appears to me the two inductances
Or can we assume that if the cards are read well than the head is ok and the problem is elsewhere?
Thx for help !!