Just an idea and I don't know if this is your situation.
If the brushes are severely worn down, the starter is designed to prevent the holders from making contact with the armature and causing serious damage.
When a starter stops working from worn brushes it's maintenance time.
Burnish the armature, do some cleaning, check/lube bushings, replace contacts and replace the brushes.
Last edited by buoymaker; 03/05/2022 4:47 PM.
