light go out when i press the dimmer switch

hi ,, i am having two issues with my 66 dart gt.

the first one is when i press my dimmer switch instead of high beams on my lights go out. do i have this wired wrong ? or any suggestions.

my second issue is on my console shifter there was an indicator there to send a signal to my reverse lights when in reverse. that switch is broken . my question is where could i find a new switch for this .

these two items are preventing me from having my car inspected in pa. so any advice or help would be greatly appreciated
thank you tom p.