The Diesel Stop banner

Can someone explain the alternator/charge indicator circuit to me ?

3138 Views 4 Replies 3 Participants Last post by  cowboyup151
I'm looking at a schematic in a Haynes Superduty manual.

The "Generator" has 3 wires coming out of it: B, A and "-". Additionally, the alternator is grounded.

So... B goes to the batteries. Makes sense. This is the big cable connection.

A goes to the battery junction box and has a 6A fuse.

"-" goes to the battery junction box but has the key and charge indicator in the circuit.

I don't understand the function of A and "-".

One more thing: I thought the ECM controlled the field in these alternators and I don't see a field connection anywhere.

Thanks in advance to anyone who can explain this to me.
1 - 1 of 5 Posts
I have dual alternator I just had both rebuilt. But now i'm getting a control fault code for the lower alt its a 1106, does any body had this problem? Its charging fine on either alternator when isolated ? I've gone thru the troubleshooting steps from ford maintenance manual for the code but don't see any problems. But the code comes back.
1 - 1 of 5 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.