2 wires on the alternator? - Third Generation F-Body Message Boards

91GTABird · 03-30-2005, 06:15 PM

Its a long story so i will just cut to the chase.

On the stock connector and stock replacement alternator for a LB9 730'ecm where does the BLACK wire on the connector suppose to go?

Its ohming out in the mega ohms like 3.2 or something. If i leave it hooked up to my alternator it wont charge.

So i have it ran to my fuse panel. BUT...i have it switched b/c if i leave it directly hooked up to a 12v source my battery will go dead over night.

Thanks for any help.

Here is a pic of what wire im talking about. Its the black one that the red arrow on the left is pointing to.

Tibo · 04-05-2005, 12:18 PM

Your alternator has the two wires on the connector you show. The brown colored wire should go to a switched 12 Volt, basically on with key. That is what turns the alternator on to start charging the system. I had left it disconnected on my car and my battery was dying also. I believe that the other two wires go to the starter.