Re: Add-On-Air Conditioning, 54 Cavalier.

Posted by PackardV8 On 2012/5/15 7:36:20

One bit of info we are missing is what kind of alternator is used. Are we to assume it has a built in regulator??? Maybe it doesn't.

**** In any case the alternator OUTput should charge the 12v battery back thru the 12v OUTPUT post of the 6v activated relay. ******* Alt should not charge directly to the 12v battery post.

There should be one, exactly one and only one wire coming off of the 12v battery + post. It should connect to the INput side of the 6v activated relay. There should be no splices nor anyother form connections between 6v activated relay and + post of 12v battery.

i.e. the 12 v OUTput post of the relay becomes the sole 12v power source as if it were the + post a battrery and that is all. So the alt will also charge back thru the OUTput post of the relay.

For all intents and purposes the OUTput post of the relay is exactly and only an extension of the + post of the 12v battery. Which means that the 12 battery + POST has exactly one and only one connection made to it and that is INput side of the relay.

The 6v relay is activated by the 6v ignition switch.

Look at it this way:

The relay acts like one of those 'green knob' battery disconnects for the 12v battery. The only difference is that instaed of phsically by hand turning a green knob one simply turns an ignition sw. to make make or break the connection of the 12v battery post.

Now, EVERYTHING 12v must treat the OUTput side of the realy as if it were the POST of the battery and that the post of the battery is non accessible otherwise.