73 dart headlight issues

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  1. jimhanno

    jimhanno New Member

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    I have a 73 swinger with a 225 in it. My parking lights, brake lights, and turn signals work but my headlights won’t come on. I swapped the headlight switch on the cluster but still no luck. Any thoughts? I also switched out headlights too.
     
  2. crackedback

    crackedback FABO Gold Member FABO Gold Member

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    check the dimmer switch.

    Before spending money on parts, grab a test light or voltmeter and check whether items are getting juice. Will narrow down where the issue may lie.

    With HL switch on, probe the green wire going into the dimmer and see if one of the the other two is hot. The other wires will likely be violet and red.

    Next trouble spot would be your bulkhead connector.
     
  3. jimhanno

    jimhanno New Member

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    I apologize, I’m a beginner with this type of thing, I’ll check my dimmer switch as soon as I can. Would this issue be related to my heater and windshield wipers not working?
     
  4. jimhanno

    jimhanno New Member

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    And thank you for the help
     
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    • Mattax

      Mattax Just the facts, ma'am FABO Gold Member

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      Headlight circuit is basically the same in your '73 as discussed here.
      Headlight issue
       
    • Mattax

      Mattax Just the facts, ma'am FABO Gold Member

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      It shouldn't be but with the little info so far, yes its possible.
      It shouldn't be because the heater fan and wipers only get power when the key is in run or accessory position.

      Headlight circuit is wired as shown (Details such wire colors and particular connector cavity sometimes differ from year to year)
      upload_2021-5-4_21-43-39.png
      The headlight's power goes into the B1 terminal on the switch. Headlights have a circuit breaker in the switch.
      Parking lights get power from the B2 connection on the headlight switch. B2 is fed from a fuse that is always hot.
      Wiper switch usually has circuit breaker and gets power from the switched 'accessory' feed.
      Heater fan gets power from a fuse that gets power from the switched 'accessory' feed.
       
    • crackedback

      crackedback FABO Gold Member FABO Gold Member

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      No problem... electrical stuff can be a PIA.
       
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