battery over charging

[justin16440]

While the car is running I am getting 16.8 volts at the battery  Alternater wire harness voltage regulater is all new I am worried about cooking the battery and being stranded.

[Moparal]

You might want to check and besure that your volt regulator has a good ground

[6packCuda]

  The regulator is clearly not working. And yes, you are going to fry your battery.

[Chryco Psycho]

it could be a bad diode in the alternator as well

[justin16440]

Grounded th VR to thje frame didn`t work still at 16.8 volts I took my old wiring harness out and  cut out from the VR plug and wires put that in and I got 14.2 volts at the battery Something wrong with my brand new harness from Evans  I guess I will start cutting the tape off to see if I can find a brake somewhere

[Moparal]

You might try a ohm meter to see if it has continuity through it, before cutting up anything. Might be the connector itself or something

[0tter45]

Check the field voltage at the alternator.  I bet you have a voltage drop in your system.   I have had problems on both my 74 cuda and 74 dart.  I put in a relay that that is feed diectly from the battery and ensures the alternator field is getting proper voltage.  My cars both charge now at 14.5 volts instead of 15.5-16 volt.  The blue wire carrys a big load feeding the coil, ignition box and exciting the field.  I chased my problem round and round changing the voltage regulator. Cleaning the bulkhead connector. The problem could even be in the ignition switch itself. 


Otter

[sleepychallenger]

check the alternator, i had the same problem and spewed the battery acid all over my new paint. i even replaced the alternator and found that the one that Orilieys showed as correct, was not correct and was letting the alternator operate at full field. 

[justin16440]

Checked for continuity have that went through everthing again pluged my new harness back in I get 15.6 volts at the battery and alternater at rest now i get 18 volts at the battery and alternater when running.plug in my old Vr plug in  I get 14.9 volts  I am going to try another new alternater.

[ShelbyDogg]

That EVAN's WIRING HARNESS IS BAD!   If you put the old harness in and get 14.2 volts (good)  and then put in the Evan's harness and get 18v (bad) what is that telling you?  The guy at EVANS is COLOR BLIND!  I had to fix 2 problems with other people's cars with brand new EVANS harness.   You better check every wire in that harness and compare it against every wire in the old one.   It's a good thing that you didn't burn down the whole car using that thing.

[justin16440]

After pulling my hair out And wasting money I found out my meter was bad I bought a new one now I get 14.6 volts  thanks for all your help