Greetings and thanks for the responses..
Yes the drivein uses a FM broadcast for audio which is why i need the acc on.
I have tried different settings on the display already with headlights on/off and those are just for the display. Any settings i have found only affect the display and do nothing to the instrument cluster.
Yes, the dimmer switch works when the headlights are on so the switch is working.
Thanks again for the responses