Josh,

Stuart (atomarc) and others will chime in with helpful advice. If you are able to post a photo of the installation diagram you received (especially for the alternator), more will be known about your harness.

By the way, you are mixing vendors:

Patrick's Antique Cars & Trucks

Chevy Duty is no more.

It is now called: Classic Parts of America

battery connects to - amp meter terminal,
+ amp terminal connects to alternator stud,
one wire (14 gauge?)of DA connects to one ignition switch terminal,
second ignition terminal goes to coil,
third terminal connects to headlamp switch with 10 gauge wire.

Does the wire from the DA plug send power to the ignition switch?


My guess is that the wire (or, one wire) from the DA switch is used to "excite" the alternator and trigger it's charging. (a one-wire alternator is wired differently and behaves differently, but you most likely do not have a one-wire alternator)

Tim