Flickering head lights, what am I missing

67Dart273 said

I'm sorry that makes no sense The diagram shows 3 terminals. Doesn't the disconnect have 2 large and 2 small?

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The round item on the drawing with 3 terminals is the alternator.
You are correct my disconnect has 2 large and 2 small terminals.
The disconnect is shown on the far left of the drawing and I am using two terminals, one in and one out.