Dimmer switch

[57 Ford Kustom]

Guys,
   My dimmer switch only has four wires running from it, two red, and two green. What feeds the power to the switch?
Thanks,
Tim

[BWhitmore]

The red/yellow wire goes to the I terminal on the headlight switch.  The green/black wire is high beams.  The red/black wire is low beams.  The other green/black wire goes to the high beam indicator on the dash.  Taken from a 57 under dash wiring circuit produced by Bauer Electronics.  Wiring circuit is posted on ths forum.

[BWhitmore]

Wiring diagram is posted under topic "Dash Lights".

[57 Ford Kustom]

Thanks!
Tim