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  •  » FYI Ford, Classic Mustang Tech Discussion
  •  » No High Beam on My 1966 Mustang

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    9/04/2016 9:34 AM  #1

    gotstang
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    From: Woodstock Ontario Canada
    Registered: 4/01/2013
    Posts: 60

    No High Beam on My 1966 Mustang

    Hi I have a 1966 Mustang with no hi beam headlights  Low beam works fine  checked all the grounds everything is good with the grounds changed dimmer switch on the floor with a new one still no high beam. I added one of them kits for brighter head lights from a vintage mustang parts store still no high beam I plugged every thing back to the factory head light plugs still no high beam .I have tail lights and dash lights and the red high beam indicator light is on in the dash but no high beams the low beam works fine tail lights dash lights allgood Can anyone give me ideas on how to get high beams and the head lights are new also Thanks any Help will be appreciated

    Last edited by gotstang (9/04/2016 9:40 AM)

     

    9/04/2016 9:46 AM  #2

    Rudi
    Senior 24-7 FYI Addict

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    From: Stuck in the 50's Welland Ca
    Registered: 4/01/2013
    Posts: 3,992

    Re: No High Beam on My 1966 Mustang

     Get a continuity light and check out the voltage starting at the dimmer switch to the wires to the high/low terminals on it and then to the wires termination at the head lamp.

    Good work ain't cheap, Cheap work ain't good!   Simple Man
     

    9/04/2016 10:50 AM  #3

    boomyal
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    From: Vancouver, Washington
    Registered: 4/01/2013
    Posts: 1,295

    Re: No High Beam on My 1966 Mustang

    Did you check the juice at the dimmer switch?  That is the first place I would look.

     

    9/04/2016 11:34 AM  #4

    gotstang
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    From: Woodstock Ontario Canada
    Registered: 4/01/2013
    Posts: 60

    Re: No High Beam on My 1966 Mustang

    check continuity at the head light plugs 12.10 low beam 12.22 high beam' and 12.27 at dimmer switch dont know if im using the continuity gauge  correctly and there is juice at the dimmer switch

    Last edited by gotstang (9/04/2016 11:35 AM)

       •Thread Starter
     

    9/04/2016 11:42 AM  #5

    gotstang
    FYI FORD Member

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    From: Woodstock Ontario Canada
    Registered: 4/01/2013
    Posts: 60

    Re: No High Beam on My 1966 Mustang

    I also jumped a wire at the dimmer switch low beams still come on but when i jump the wire to the high beams they dont come on tail lights dash light and high beam indicator in the dash are all on but no hi beams

       •Thread Starter
     

    9/04/2016 1:02 PM  #6

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,600

    Re: No High Beam on My 1966 Mustang

    Are you sure the bulbs are good?  It would be rare I think for both high beam filaments to go out at the same time, but not impossible. 

     

    9/04/2016 1:07 PM  #7

    gotstang
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    From: Woodstock Ontario Canada
    Registered: 4/01/2013
    Posts: 60

    Re: No High Beam on My 1966 Mustang

    bulbs are new

       •Thread Starter
     

    9/04/2016 1:18 PM  #8

    Hornman
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    From: Mansfield, Texas
    Registered: 4/01/2013
    Posts: 1,568

    Re: No High Beam on My 1966 Mustang

    Your troubleshooting so far points to the high beam filaments not working. Time to break out the alligator clips and power the high beam filaments directly from the battery. That will determine whether the high beam filaments are good.

    I have purchased seal beam headlight bulbs that had nonworking filaments.

     

    9/04/2016 2:00 PM  #9

    gotstang
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    From: Woodstock Ontario Canada
    Registered: 4/01/2013
    Posts: 60

    Re: No High Beam on My 1966 Mustang

    Boy I feel like a dummy I checked the new bulbs hi beams are not working   put my old bulbs back in and everything works fine hi and low beams Thanks for all the help guys I must of bought bad bulbs or burned out both hi beam at same Time  Thanks again for all the help guys now im on the road again

       •Thread Starter
     

    9/04/2016 2:04 PM  #10

    gjz30075
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    Registered: 4/03/2013
    Posts: 184

    Re: No High Beam on My 1966 Mustang

    No need to feel like a dummy.  I wouldn't have expected two bad bulbs either, or even one.

     

    9/04/2016 3:42 PM  #11

    Hornman
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    From: Mansfield, Texas
    Registered: 4/01/2013
    Posts: 1,568

    Re: No High Beam on My 1966 Mustang

    Nonfunctioning new headlight bulbs are more common than you would think.

     

    9/04/2016 7:25 PM  #12

    DC
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    From: Marshall, MI
    Registered: 4/01/2013
    Posts: 1,251

    Re: No High Beam on My 1966 Mustang

    Who da Thunk both high beams would go bad at same time? ME cause I had same problem on my ^^ Galaxie 500 XL some years back. Did same as you and changed everything else to no avail! Finally got Humble and changed the lights and ...................

     

    9/04/2016 9:50 PM  #13

    almcgee
    I FYI 24-7

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    From: Fairview, Texas
    Registered: 6/01/2013
    Posts: 783

    Re: No High Beam on My 1966 Mustang

    Good end result.  Time tp move on to the next project.

    Mustang Steve Bash in Gruene, Texas September29-30, 2023
     

    9/05/2016 6:44 AM  #14

    TKOPerformance
    Hyper FYIFORD ADDICT

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    From: Newark, DE
    Registered: 12/15/2014
    Posts: 7,600

    Re: No High Beam on My 1966 Mustang

    "Eliminate the impossible, and whatever remains, however improbable, must be the truth".  - Sherlock Holmes via Sir Arthur Conan Doyle

     

     

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