I have a 1984 Pickup, 318, new alternator, new voltage regulator, new brain box, wont charge. Alternator is new and has been retested, when both field wires are attached alternator starts squealing but wont charge. Any help would be appreciated. Thanks

 

Field wires hook up correctly? Got proper belt tension? Usually, squealing is a sign of a loose belt.

 

 

have you hooked a multi meter to the alternator output to see what it says? if it is squealing it should be charging.

 

When you pull the field wires, there is no longer a load on the alternator, so, belt stops slipping.......

 

Belts are not slipping, still doesnt charge

 

did you test the voltage output at the alternator?

 

Testing alternator only shows battery voltage, its brand new and has been retested twice to ensure that it works.Voltage gauge doesnt even show a discharge or charge when vehicle is running

 

If you are only seeing battery voltage at the alternator, with the engine running, the alternator is not working. If the alternator works fine on someones test stand, then the regulator, or wiring becomes the next suspects.

 

it really sounds like a bad alternator if it the belts squeals when you hook up the field wires but no voltage comes out . i would agree with heyyou to check wiring and maybe try changing the voltage regulator, new one are more prone to being junk and failing