Signal Cam/Hazard issue

Discussion in 'Technical' started by Gombie72, Jun 18, 2019.

  1. Gombie72

    Gombie72 Member

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    My '74 mercury is almost to the point of being road legal, but the one issue that is holding me back is that the hazard lights do not work. I know that my turn signal cam is messed up because at one point during my garage restoration, I had taken the wheel assembly apart and replaced the lock cylinder. During this time I discovered corroded connections, and some broken plastics. I have the signal cam on its way, but I cant remember if there were any electrical connections relating to the hazard lights on that cam. potentially would a new signal cam be a solution to non-functional hazards, or are there any other common failure points I should know about? Thanks a lot! - Brad
     
  2. yellow75

    yellow75 MCCI Oregon State Rep Supporting Member

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    Turn signals , brake lights and I just imagine the hazard lights would go through the turn signal cam . There are two flashers one for turn signals and one for hazard lights. A common issue with these cars is loose or corroded ground connections . Being you have a 74 it is the only year that came with a seat belt interlocking device that is suppose to keep car from starting if seat belts are not fastened, if you look under the hood on drivers side you will see a red button and that is an over ride for the interlock, really not sure how it works or doesnt work .
     
  3. Gombie72

    Gombie72 Member

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    Huh. I actually was not aware of this. I know the little red button you are talking about, but Ive never had a problem without seatbelts fastened. Although, I don't think that the brake lights would go through the cam. I don't think there would be a need for them to.
     
  4. Krazy Comet

    Krazy Comet Tom

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    Brake lights feed through the signal sw as do four way flasher. Switch on cam breaks power to brake lights and switches to feed from flasher.
     
  5. William623

    William623 Member Supporting Member

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    What are you emergency flashers doing? It is likely your flasher unit is bad.
     
  6. Gombie72

    Gombie72 Member

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    Thats interesting! thanks for the reply!
     
  7. Gombie72

    Gombie72 Member

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    I can pull the flasher switch to the on position under the column with little resistance, but it clicks into place. Nothing happens when I do it. No lights, no relays clicking, or otherwise.
     
  8. Krazy Comet

    Krazy Comet Tom

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    Wiring diagram of switch, not Maverick but Ford and all are basically same

    It's common for green or blue wires at cam to break killing signal or brake lights.

    brakesignalsw.jpg
     
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  9. RMiller

    RMiller My name is Rick

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    Start with the flasher, a very common practice was to swap them out when the turn signal flasher failed. Since hazards are rarely used they usually go through life with the dead flasher form the turn signals.
     
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