Charging issue or alternator?

[flamesoldier]

Is my alternator shot? The battery terminal on alternator running is 14.03V, the blue field is 12.58V, the voltage regulator is brand new and grounded good. The battery is only charging at 12.23V. If i remove the lesser voltage field terminal and jump it to battery negative she charges right up at 13.8V. The connections to the ammeter are tight and clean. If the alternator taking a dump?

 

[Chryco Psycho]

If the Alt is putting out 14 + volts the alt should be working but the battery should read the same so you could have too much load , with electric fans , fuel pump etc . or you could have resistance in th circuit ,corrosion / bad connects etc . The regulator could also be bad , new means nothing , probably chinese made , you ground the field & it charges properly it seems to be a bad reg .

 

[Challenger RTA]

Really long story short. Have a number of cars for a number of reasons. Car 1 had a charging problem. About an hour of driving or just sitting there running. The alt light would come on. Checked at battery and alt it was charging. Cleaned all chassis grounds inside and out. Have the same kind of car 2 swapped alt. Never had a problem with car 2 alt and the alt that I swapped to it. And to this day still don't have a problem with car 2.
Completely removed the wiring harness from the dash and under the hood. Check and cleaned fuse boxes and connections. And yes the computer that controls everything. That can be task in today's cars.
So I put my brain in Rocket Scientist mode and figured it out.
Think simple. And I did. I stared at the alt the mounting bolt were the problem. Took ever one out, cleaned them and the holes too. Voila! Fixed!

 

[flamesoldier]

Wandering if this 9.5 resistance is my issue voltage regulator shouldnt it be 1.75 ?

Really long story short. Have a number of cars for a number of reasons. Car 1 had a charging problem. About an hour of driving or just sitting there running. The alt light would come on. Checked at battery and alt it was charging. Cleaned all chassis grounds inside and out. Have the same kind of car 2 swapped alt. Never had a problem with car 2 alt and the alt that I swapped to it. And to this day still don't have a problem with car 2.
Completely removed the wiring harness from the dash and under the hood. Check and cleaned fuse boxes and connections. And yes the computer that controls everything. That can be task in today's cars.
So I put my brain in Rocket Scientist mode and figured it out.
Think simple. And I did. I stared at the alt the mounting bolt were the problem. Took ever one out, cleaned them and the holes too. Voila! Fixed!

 

[Challenger RTA]

This is an explanation of how the voltage regulator should work.

 

[Challenger RTA]

This is how to do a test on the car. The point I'm making is I think it is a ground. The mounting bolts for the alternator are the ground. Check the neg cable on the motor and chassis ground. The voltage regulator when bad most of the time,will read open or a dead short.

 

[Challenger RTA]

Having the right parts is a must.

 

[flamesoldier]

Having the right parts is a must.

These are great, to start with the battery ground is on aluminum intake manifold which im sure isnt great

 

[pschlosser]

These are great, to start with the battery ground is on aluminum intake manifold which im sure isnt great

That's how it is on my car. I think this is where it's supposed to be grounded, on the front-most driver-side intake manifold bolt. There is a webbed strap near the starter that then grounds the chassis to the engine.