over charging off idle

[bre73powerwagon]

hi guys my 73 over charges to full charge when I step on the gas I have changed the alt & regulator, melted the old regulator! I was told there is some kind of regulator behind the insturment cluster that can cause this problem ? or volt gauge? thanks in advance for any information its got to be something simple! I have un plug'ed every thing I though could causing it to trigger it to charge, my dash lite's don't work, I think the over charge could have blew it out! my dash is in rough shape any way. I have had problems with it fuel gauge, lites speed o.

[Gordon Maney]

Do you have a voltmeter?

[bre73powerwagon]

yes I do thanks

[Gordon Maney]

In the dash, or hand held?

What does it read at idle and what does it read above idle? How many volts?

[tbone1004]

I'm not really familiar with the wire diagrams of these things, but if it is a 3 wire alternator make sure the sensor wire is unobstructed and runs straight back to the battery. If the sensor wire is going somewhere that is experiencing voltage drop either through a bad ground causing high resistance or something else, it will overcharge.