Serious Charging system problem

[Nesner]

Ok i have a 69 with the 302, i just replaced the alternator, and regulator. Now battery wont charge, so i created a jumper wire from the field on the alt to the battery and low and behold it charges, well now it over charges when im driving highway speeds. all grounds are good from what i can tell with my multimeter. any sugestions? Oh and sadly my girl is my daily driver so not taking her out of service would be awesome. thanks guys and gals.

 

[Viperwolf1]

If you can jump the orange wire and make it charge then the voltage regulator is not working. Make sure the connector is on good and the regulator is well grounded. In fact if you hooked up the connector before you grounded it, it may be toasted.

Before replacement check voltages on the yellow and green-red wires.

 

[Nesner]

Ok so my regulator could be trashed, what exactly does the regulator do, in a dummy explain please. i am kinda new to the restore process

 

[Viperwolf1]

The regulator senses battery voltage through the yellow wire and sends a current to the alternator field (orange wire) to cause the alternator to charge. The weaker the battery voltage, the more the current sent to the field. The green-red wire turns the regulator on.

 

[Nesner]

oh rock on, that help a whole hell of a lot, thank you your the first person to actually know what an external regulator does. thanks again

 

[Steve83]

An external regulator does the same as an internal one - there are just more wires to make the same thing happen.

 

[Viperwolf1]

BTW, welcome aboard. If you're not busy Saturday there's a big Bronco get-together happening. See here: http://classicbroncos.com/forums/showthread.php?t=170751