Unplug the wires to the voltage regulator. Now check each wire (in the harness) to ground-use the ohms scale. You should get no readings. If ether wire shows a reading you will need to unplug the wires at the alt. and recheck the wires to ground. If you get no readings now you will need to check the alt. Check each tab(were the wires plug in) to ground. If you get a reading now you have a bad brush holder or bad alt. remove the brush holders (they are plastic and held on by a screw)The brush holders come with the brushes on them-they are held on by a phillips screw. You can get new ones at the stores and they are cheap.
