Hi, I having a starter problem, I metered this and I measure a short from stud to ground. So I did rebuild of this changed the field coil unit and brushes, mounts. Old field coil was damaged Insulation was melted off. The starter really looked in bad shape really dirty etc., I only had this for about 2 months and went bad. The guy I brought this from had it stored in barn. anyhow I did this rebuild and still have same problem powered up and no turn , dead. upon checking again the pos. stud to ground reads shorted. I removed again., check over cannot find anything else. could this armature be shorted? when armature is removed reads no short. install armature and reads short. little confused whats up with this and need some advice. thank you jim