charging problem

I have checked other ballast resistors with this meter and got readings on them, i'll change the battery in my meter and test again.

I did remove the wires when I tested the ballast.

To check voltage drop turn the key to run but with engine not running

Put one probe directly onto battery positive post. Put the other probe as "close as you can" tot he regulator IGN terminal. This might be the "high" (ignition switch) side of the ballast, or the blue field wire on the alternator.

You are hoping for a very low voltage, the lower the better. More than about .2-.3V (three tenths of one volt is too much



I did this but it was hard to tell because the voltage on the battery was dropping, voltage dropped into the 11 v range. I tried this test also while it was running and had 14.8v at battery and 14. 2 v at ign side of ballast

my car is a 73 model and has a 5 pin ecu and dual ballast


perhaps my battery is on the way out the door.