Need headlight help.

Discussion in 'Wet behind the ears??' started by GS455RagTop, Feb 14, 2021.

  1. GS455RagTop

    GS455RagTop Member

    Just bought a 72 GS 455 ragtop and need to find out why my high beams only work. I changed out the switch in the dash (royal PITA) and it did nothing. By chance if there are only high beam lights in all 4 of the sockets, would that cause an issue (Haven't checked that yet) Also, are the inner lights the high beam or the outer?
     
  2. GSX 554

    GSX 554 Gold Level Contributor

    All 4 actually have high beams . The outer are low beams AND High beams . The inner ones are High beam only . The outers have 3 prongs on the bulb and the inners have 2 prongs on the bulb .

    Most common cause of problems is the dimmer switch itself . It has 3 wires to it . One is from the headlight switch and then depending what position the switch is in power goes to the Low beams ( one wire ) OR the high beams ( other wire ) . Easy to check with a test light .

    First make sure , like you said , that the bulbs are correct . And they are working .
     
  3. GS455RagTop

    GS455RagTop Member

    I gotta check the bulbs. Like I said, All 4 light up and after putting in new switch, all 4 still light up. I mean there is no floor switch or any other switch other than the dash switch I replaced, correct?

    Believe it or not, I had a nightmare with the flashers all going on whenever the left turn signal was turned on. I replaced the switch and relays and it did the same thing. I checked the bulbs and the previous owner had 2 way bulbs in the back up lights. I put the correct bulbs in and all those other issues went away. The 2 way must have been shorting out the lighting.
     
  4. GSX 554

    GSX 554 Gold Level Contributor

    Dimmer switch is on the floor . to the left of the brake pedal . pushing it changes Low to High beams
     
  5. GS455RagTop

    GS455RagTop Member

    That could be the problem, there is no dimmer switch on the floor, like my GTO had. Thought is was a Buick thing and was in pull switch. The previous owner must have really did some handiwork. Thanks for clarifying that.
     
  6. GSX 554

    GSX 554 Gold Level Contributor

    Funny what people Butcher . Look around that area . Could be he shoved it somewhere . Or you'll see the plug for it he jumped out . Looks like a pyramid . 2 on the bottom and 1 on the top
     
  7. BrunoD

    BrunoD Looking for Fast Eddie

    If you need a dimmer switch with a small harness,I have them.Bruno.
     
  8. GS455RagTop

    GS455RagTop Member

    Thanks for your help!
     
  9. GS455RagTop

    GS455RagTop Member

    Hopefully it's still there but thanks for the offer. I will let you know.
     
  10. pbr400

    pbr400 68GS400

    If your dimmer is missing, you’ll be better off with a used original USA one than a new one. Even the AC Delco part is a chinesium replacement now.
    Patrick
     
  11. Dr. Roger

    Dr. Roger Stock enthusiast

    Might still be under the carpet.
     
  12. GS455RagTop

    GS455RagTop Member

    WINNER WINNER .....previous owner carpeted over switch!
     
  13. GS455RagTop

    GS455RagTop Member

    Low and behold, previous owner carpeted over switch. Glad something was an easy fix for once!
     
    FLGS400 likes this.

Share This Page