FJ60 altenator question

[FJ60]

Driving in this morning I was beating on the steering wheel to favorite tunes when my FJ60 idled waaaaaaaay down, the charge light came on and she started spitting and sputtering ???

 

[Rice]

She likes to be petted. No beat.

With the engine running pull off a battery cable. A charging system will keep running without the batt.

 

[73lndcrsr]

Just don't do that very long, the alternator (if it is good) will max out and can go bad.

 

[FJ60]

[quote author=Rice link=board=1;threadid=4499;start=msg33702#msg33702 date=1061469707]
She likes to be petted. No beat.

With the engine running pull off a battery cable. A charging system will keep running without the batt.
[/quote]

I know she hates it when I beat on her ran well at lunch, maybe yesterdays fill up or the 95 degree temps got her feeling down (vapor lock, bad gas???) all is well at 211,000 miles - she's barely broken in

 

[Rice]

[quote author=73lndcrsr link=board=1;threadid=4499;start=msg33731#msg33731 date=1061478035]
Just don't do that very long, the alternator (if it is good) will max out and can go bad.
[/quote]

Without the battery the net draw on the alternator is less, not more. Otherwise the battery wouldn't be getting a charge.

 

[73lndcrsr]

The load is less, but the alternator sees it as an open and will try to compensate. I did this and measured significant increases in voltage and current output from the alternator. A mechanic buddy told me about the issue, so I hope I have my facts straight. My alternator ended up being good, I had other issues. IIRC bad/correded connections.