Battery light on. How to identify alternator model/brand?

[jac]

Thanks gents. I did not get a chance to get the splash guard and all that other stuff out of the way so I did not get to use the mirror to check the brand, but thanks for the photo, now I know what to look for!

I was however able to get the cluster tests to work. With engine OFF, test #9 says 116, which I assume means 11.6volts. With the engine ON, test #9 says 111 (or 11.1v).

The battery was fully charged 2 weeks ago and the car had been sitting in the garage without me messing with it for 2 weeks and I can't believe it has discharged the battery that much just sitting there. :-)

Now that the test showed me the low voltage while running, I am going to assume that means that alternator is bad and so will spend some time tomorrow removing the alternator.

[Fifty150hs]

Originally Posted by jac

Thanks gents. I did not get a chance to get the splash guard and all that other stuff out of the way so I did not get to use the mirror to check the brand, but thanks for the photo, now I know what to look for!

I was however able to get the cluster tests to work. With engine OFF, test #9 says 116, which I assume means 11.6volts. With the engine ON, test #9 says 111 (or 11.1v).

The battery was fully charged 2 weeks ago and the car had been sitting in the garage without me messing with it for 2 weeks and I can't believe it has discharged the battery that much just sitting there. :-)

Now that the test showed me the low voltage while running, I am going to assume that means that alternator is bad and so will spend some time tomorrow removing the alternator.

If the alternator is only putting out 11.1 volts running I'm surprised it runs. I wouldn't trust a battery test in a auto parts store. I've taken batteries in that would not charge that my battery charger said were bad and they tested ok in the parts store. You definitely have a bad alternator. Put in a new one and put the battery on a charger for 24 hours. After charging for 24 hours put a voltmeter on it and see what the battery is holding. If it's not holding 12.3 volts it may be bad as well.

[Clavurion]

Originally Posted by jac

Now that the test showed me the low voltage while running, I am going to assume that means that alternator is bad and so will spend some time tomorrow removing the alternator.

Or just remove the voltage regulator is situ without removing the alternator. Then renew just the brushes (or the regulator with brushes).

[jac]

Originally Posted by Clavurion

Or just remove the voltage regulator is situ without removing the alternator. Then renew just the brushes (or the regulator with brushes).

That sounds like a lot less work! I am gonna try that for a little and see if I can figure out how to do that. Thanks!