1969 dart alternator problems

Everybody loves to trash these old alternators because they "don't put out at idle."

But I have found that in many cases there is a MULTITUDE of problems.

You may (PROBABLY) have some connection problems in the bulkhead connector. These were marginal in design "back then" and have not improved with age.

Google up the Mad Electrical bypass, whether you do this or not, at least read ab out the problems:

http://www.madelectrical.com/electricaltech/amp-gauges.shtml
from this page here:
http://www.madelectrical.com/electrical-tech.shtml

The other question is, "where did you hook up the pump?" Have you checked how much voltage it is getting? Have you checked the "voltage drop" it is suffering?

In my own case, before doing a partial re-wire on my own 67, it was suffereing a ONE VOLT DROP in the ignition circuit. In a 12-14V system, one volt is a LOT of drop.