[VetteVet]

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Originally Posted by koda360

If I'm wrong, correct me please, but looking at your pics, it looks like a 3 wire alt. The white plastic plug on the top, should have a white wire on it as well as the smaller red wire. If only we knew

The smaller red wire goes to the large post, or through the AMP meter, then back to the large post. The smaller red wire goes to the large post or to the no.1 terminal on the Ext VR and it isn't red it is blue, and from there it goes from terminal 3 as a red wire to the 4-way junction . If it's an internal regulator then the wire can go to the large post or better yet to the 4 way junction for better voltage sensing. It is usually a red wire all the way. It has nothing to do with the amp meter.

The small white wire would go through the warning light, then to the key on position of the ignition switch. This is true unless it's an external regulator then the white wire goes to terminal 2 of the External VR and exits at terminal 4 as a brown wire and then goes to the firewall block where it splits on the inside and becomes a resistance wire and goes to the key switch. The idiot light wire runs from the fire wall block to the light and then to the fuse panel where it is activated by the key switch power from the accessory terminal. If it's an internal regulator alternator ( 3 wire) then the white wire would go right to the firewall block by splicing into the brown wire at the external VR or just running all the way to the fire wall block to the correct brown wire. Check the diagram in post 9.

The heavier (8 or 10 ga) red wire goes from the large post on alt, to battery positive, or the junction block, if you have one. If you have an ammeter and want it to work then the large red wire will have to go to the junction block. The other positions will work to charge the battery and run the accessories.