It is possible.Ive seen import cutouts with the cap on wrong.Take the cutout off the tractor.Put it on the bench.Measure the generator terminal to case with an ohmmeter.You should read the resistance of the shunt coil.Next measure from bat terminal to cutout case.You should get no reading.Heres what happens when you connect a cutout backward.The battery voltage closes the cutout points and the battery discharges thru the generator.If the fan belt was off the generator would turn like a motor.This will go on until the battery is dead.Post back after you have made the bench test.Your wire harness and cutout probably come from china,the land of almost right.Get your ammeter wired right.A stuck or backward cutout will show a heavy discharge on the ammeter when the engine is shut off.Your ammeter reading back ward is proof that something is wrong in the wire harness.I have owned 5 Ford cars with 3 brush generators and cutouts on them so I know a bit more about cutout relays than you .
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