couple of 400 questions

I took my old alt (12v conv delco)into auto zone to have tested. It failed the test not charging. To prove the machine was working properly he also tested the new one. PASSED. The guy behind the counter said this new one was the same as the old one. He called it a ONE WIRE set up. Dont need the two wires cause something like it excites only when needed. Any ways here is the tow pics of before and after. what am i doing wrong. Now the ampmeter goes all the way to charge when giving some throtle.

• farmall 400

try this and see if you come up with something

To repair the rim .... cut out the rusted part....weld in a patch --- move to a solid area and drill a new valve stem hole.....Don

this is what the alt hooked up before looked like. The guy said the wire with the blue loop on it was not needed with the new alt.

• farmall 400

The alternator WILL charge with just the large output wire connected, but, likely, the engine will have to be revved up somewhat, after each startup, for it to begin to charge (excite).

Some of us prefer the "OEM-type" 3-wire setup like you HAD, but the goofy "one-wire" units always seem like the "cat's whiskers" to the "electrically challenged", as Dell likes to say, over on the "N" Ford Board.