[FC] Proper Way to Test Alternator

[J. R. Read]

Your local FLAPS will test alternators free of charge.  You will probably 
need to know what vehicle it (originally) came from.

Later, JR

----- Original Message ----- 
From: "Kevin Clark kevin--- via Corvanatics" <corvanatics at corvair.org>
To: "corvanatics group" <corvanatics at corvair.org>
Sent: Friday, May 08, 2015 6:39 PM
Subject: [FC] Proper Way to Test Alternator


> Hey gang,
>
> What is the proper way to test your alternator? The shop manual might not 
> be helpful since I have an internally regulated alternator instead of 
> stock generator on my 1964 FC engine.
>
> Currently I have one wire plugged in the "R" side of the RF terminal on 
> the alternator. Here are the steps I think I should do and correct me 
> along the way:
>
> Unplug the battery and engine harness wire from the BATT post on the 
> alternator.
>
> Unplug the one wire plug from the "R" socket from the alternator.
>
> Connect a jumper wire from the battery post to the "F" side of the 
> terminal.
>
> Connect a voltmeter from the BATT to the ground.
> Question here is there is no "GRD" on the alternator. Do I use the engine 
> frame rail as ground?
>
> Run the engine at 1500 RPM for several minutes. What reading should I get 
> on the voltmeter to determine the state of the alternator?
>
> My RetroSound radio quit working and I discovered I wasn't getting 12volts 
> to the radio. I can rule out the voltage regulator since it is not in use 
> with the internally regulated alternator. I am getting 12.44volts from the 
> battery terminal with the engine running. Could there be another problem 
> involved causing the low voltage?
>
> Kevin
>
> ------------------------------
> Kevin G. Clark
> kevin at kcvairbrush.com
> www.kcvairbrush.com
>
>
>
>
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