Alternator light coming on very dim

[vamach1]

I drove my 72 sprint today and the alternator idiot light light came on but it was on very dimly. I supposed I should get the battery and alternator checked out. The car ran fine otherwise even though it was about 20 degrees this morning. What do you guys think?

 

[marks73]

Get the electrical checked out! Battery/alternator, sometimes a dim idiot light is a sign of a short pulling your system down. Sometimes it's just the alternator beginning to fail. Don't take a chance. Get them tested!

 

[vamach1]

Get the electrical checked out! Battery/alternator, sometimes a dim idiot light is a sign of a short pulling your system down. Sometimes it's just the alternator beginning to fail. Don't take a chance. Get them tested!

I'll do that. My alternator died late at night on a trip to NJ via 95 near a very rough part of Philly in the Mach1. My wife was not a fan of the Mustang that trip.

 

[c9zx]

It sounds like a diode failure (open) in the alternator. Do you have a voltage reading at the battery with the car running? Chuck

 

[Mesozoic]

I upgraded to the 3G alternator some time ago and have never looked back.