[strictlypersonl]

Originally Posted by Dangerous Doug

I have installed a set of PIAA lights on my 289 FIA. I've wired them correctly by PIAA instructions (pull power from a battery source, switch by relay, wire the lights to come on only with brights, et cetera).

Now, when I turn on my headlights the ammeter goes below zero, showing that the addition of the lights is drawing much more current, and my alternator cannot keep up. This is true with my driving lights off.

But this didn't happen before you installed the new lights? Does the ammeter go positive when the engine is at 1500 rpm and just the headlights are on?