moparjohnny
Well-Known Member
my battery shows 12.2 while running,is that the correct voltage?nothing extra on eng just stock. cranks fine. just curious. thanks
would my 12.2 cause a little discharge at dash gauge?12.5 resting and 13.8 running
A fully charged healthy battery, after some settling of normal charging, and a temporarily higher voltage, should stabilize at 12.6 v.
Under charging, with an already charged battery,the voltage should be around 13.8 at any rpm or load, unless the alternator is weak at idle, and that's just something that's been foisted upon us by cheap rewinding nethods.
Your ammeter tells a lot more information, does it go into the charge region when you rev the rpm up some?
Steady 12.2 v will not keep your battery full.
Tell more.
my alternator only has one attached to field pos,other field pos no wire.been find before now for as charging and ammeter showing proper charge position.does not go into charge after rev up,this a electronic vr,point distributor,new ballast,new vr.how to check alternator with multimeter while car is running?
my harness only had on wire for field.if you have two tabs, you need two wires.
One from VR positive, and one negative,
which MUST find a good ground.
Did a wire just fall off?
did multimeter test today and before start it shows 12.6 and when i cranked it shows 12.6 never did go up,so its the alternator not charging the battery.my harness only had on wire for field.
thanks pop,i went back to check and i did leave a wire loose from the voltage regulator,plug it up and ammeter is setting where it should be. thanksI would check all connection at alternator & VR before throwing parts at it….it could be that simple...
What was voltage at alternator positive stud. should be 12volts engine off...
DID you full field the alternator to verify NG alternator… If you have a single field one wire alternator . Remove green wire for alternator. the green wire comes from the Voltage reg… safely ground connection at alternator to ground this will full field…The guide & video give you good pointers...