Re: 1966 Ply Satellite Alternator
[Re: BAM]
#497244
10/14/09 07:03 PM
10/14/09 07:03 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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If its not on the discharge side at idle then you're lucky, alot of them discharge. Remember the ignition system doesn't run on 12 volts either, it only uses 12 when its starting.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: 1966 Ply Satellite Alternator
[Re: BAM]
#497248
10/14/09 09:43 PM
10/14/09 09:43 PM
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Joined: Jan 2007
Posts: 7,664
IN
ahy
master
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master
Joined: Jan 2007
Posts: 7,664
IN
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Quote:
Hi All,
Replaced a dead alternator (Auto Shop tested it) in my 66 Plymouth, but unclear of what i see for voltage at the battery (the battery is brand new and charged to 12.5). I am used to newer cars where you see a decent charging voltage (13.5), here I see 12.2 at idle and the in-dash ammeter shows little change, but the voltage does go up when I rev the engine (12,3, 12.4)and the ammeter moves to the charging side, is this normal?
Thanks, BAM
If the ammeter goes to charge and the battery voltage is only 12.3 or 12.4 either the battery is down somewhat or the voltmeter is off. Just starting the car would draw the battery down enough to keep the voltage low for several minutes. Its possible all is well and you need to run it down the road for 20 minutes to bring the battery up than test again. The MOPAR regulator, when warm, should put out around 13-13.2 volts with the at engine at fast idle or more, a charged battery and no heavy electrical loads.
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Re: 1966 Ply Satellite Alternator
[Re: BAM]
#497249
10/14/09 11:41 PM
10/14/09 11:41 PM
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Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
dave571
master
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master
Joined: Dec 2003
Posts: 5,314
Carstairs, Alberta, Canada
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Quote:
thanks, there is a wire connected to a "screw post" on the unit, and a wire that slips on to a flat blade on the alternator, what should the voltage be at each point when measured to ground?
Tks, BAM
The big post should be close to battery voltage.
The spade connector will vary with the charge rate.
ALL you need to know is that the charge system voltage should be between 13.5 and 14.5 at the battery.
With the accesories off, it should be that much at idle too.
If it's not, then the alternator is not giving enough output. Either because the regulator isn't telling it too, or ther is a problem with the alt, or the wiring etc..
It sounds to me like the regulator is bad. Very common to have a reg go bad at the same time as the alt. In the old days, lot's of guys changed them at the same time automatically. 
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Re: 1966 Ply Satellite Alternator
[Re: dave571]
#497250
10/15/09 11:34 AM
10/15/09 11:34 AM
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Joined: Jan 2003
Posts: 21,065
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,065
Niles , Ohio
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Especially if its the old points type reg.If it is get a new one thats electronic.They are around 20 bucks and hook up just like the OE points style.Rocky
Chrysler Firepower
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