SOLVED - No Charging, light off in RUN, light on in ACCESSORY - No Field.

[DetroitDan]

Thank you all for the feedback!

The alternator field connection was open -- I did not open the case to find a root cause.

It looked pretty corroded inside, and since it was pretty noisy last week, it may have an open output diode too.

Also, it was kind of "rumbly" when I spun it by hand.

The resistance in the Chief's bulb/field tickler, remote sense, and output circuits are all acceptable.

So, I went to O'Reilly's, gave them $105, and they gave me a limited lifetime of charging bliss.

While I have it out, I will install a tickler circuit diode for resistor protection.

The Chief has less than 38k miles on the clock, but as you know, for many components, sitting is worse than operating.

--
Dan Wallace
Detroit Metro
1974 Canyon Lands 260
Headers, 3.55, 16"
Floor plan 26-9

 

[Jim Hupy]

You might want to rephrase that to" a lifetime of changing bliss" with
alternators. (Grin)
Jim Hupy
Salem, Or
78 GMC ROYALE 403

> Thank you all for the feedback!
>
> The alternator field connection was open -- I did not open the case to
> find a root cause.
>
> It looked pretty corroded inside, and since it was pretty noisy last week,
> it may have an open output diode too.
>
> Also, it was kind of "rumbly" when I spun it by hand.
>
> The resistance in the Chief's bulb/field tickler, remote sense, and output
> circuits are all acceptable.
>
> So, I went to O'Reilly's, gave them $105, and they gave me a limited
> lifetime of charging bliss.
>
> While I have it out, I will install a tickler circuit diode for resistor
> protection.
>
> The Chief has less than 38k miles on the clock, but as you know, for many
> components, sitting is worse than operating.
>
>
>
> --
> Dan Wallace
> Detroit Metro
> 1974 Canyon Lands 260
> Headers, 3.55, 16"
> Floor plan 26-9
>
>
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