I've got a 93 xlt that is showing the "battery" light. It appears to be NOT charging.
I measure the battery voltage while not running and it drops by about a volt while running. I find 12 volts at the stud where the large wire attaches to the alternator. I find 12 volts at the y/w wire on the 3 pin alternator plug. I find 12 volts at the 15 amp (both sides) fuse in the engine compartment.
I have removed the alternator and replaced the brush/regulator assembly. This did not help.
Are there other voltages that should or should not be present on the other wires in the 3 prong plug? How about the single plug with the b/w wire?
This alternator is about a year and a half old. The brushes looked good. It turns smoothly and does not make noise while running.
Is there a complete diognostic procedure for checking the charging systen, alterantor, diode/brush assembly??
Can the alternator be tested independently from the rest of the charging system?
If there is a complete procedure it should be posted as a "sticky" in the tech section(s).
Thanks,
Ben
I measure the battery voltage while not running and it drops by about a volt while running. I find 12 volts at the stud where the large wire attaches to the alternator. I find 12 volts at the y/w wire on the 3 pin alternator plug. I find 12 volts at the 15 amp (both sides) fuse in the engine compartment.
I have removed the alternator and replaced the brush/regulator assembly. This did not help.
Are there other voltages that should or should not be present on the other wires in the 3 prong plug? How about the single plug with the b/w wire?
This alternator is about a year and a half old. The brushes looked good. It turns smoothly and does not make noise while running.
Is there a complete diognostic procedure for checking the charging systen, alterantor, diode/brush assembly??
Can the alternator be tested independently from the rest of the charging system?
If there is a complete procedure it should be posted as a "sticky" in the tech section(s).
Thanks,
Ben