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Ok I have read the posts about the charging diagrams and looked up the diagram but all my wiring as far as I know checks out alternater checks out but still cant find my problem . My question is when the wire comes out of the vr where does it go and how does it charge the battery . And from where .1971 318

Updating this post . The green wire off the alternater goes to vr. As soon as I unplug it my voltage gauge on the dash .goes to the middle. When I plug it back in it discharges .

welder77 wrote:Updating this post . The green wire off the alternater goes to vr. As soon as I unplug it my voltage gauge on the dash .goes to the middle. When I plug it back in it discharges .

Do you have these wires connected to your alternator?
Green
Orange
Black

John

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John

Yes they are connected. When I use test light orange .and black are fine . Green shows no power from alternater when pluged in .when I plug in green wire the post loses power .

Your basing that you have no charge cause the gauge shows a discharge. You would be best to see what is happening at the BAT Pos post. Maybe the gauge was unhooked and wires reversed. Time to get out a meter.

I used a meter on it not charging at the battery either when I unplug the green wire from alt and test lite the post I got power . Plug in green wire to the alt post I lose power to green wire

When voltage is low,the green wire (field wire)becomes grounded at the VR.This causes your alternator to start charging. Is your battery fully charged ? How many volts do you have on the black wire with key on?

Battery is fully charged. Black wire I havent checked voltage at. Yet but test light works. Ill get my ohm meter on it and see