voltage across battery when charging ?

[Joel5.0]

Originally Posted by Mustang_289

Yes we did - put a brand new Powermaster 140a alt on, same readings. We haven't touched it since then.

Here's what we've done to date:
* Changed alts with same readings.
* Swapped out the battery
* Relocated the battery to the front, removing these things from the equation:
- 2G wiring to the back of the car
- Ground to the frame in the rear of the car
- Kill switch located in the back of the car
* Checked and cleaned all the grounds
* Reconnected the ground strap to FW

Following your problem, looks like some checking of the alternator output on the car is recommended....not in terms of voltage but, in terms of amps. I know this is not classic but, a checking of the power output w/inductive clamp is suggested. This to verify that the alternator is indeed producing output and, if it is, then concentrate on whats causing the voltage draw in your car. A short, severe enough to cause the alternator to go full blast in amps, will cause the voltage drop and keep it below the 14.5vdc "all fine" goal. My other 2¢. LUK.......this one is really interesting.