Flashers not working.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by jeffman164, Jun 18, 2024.

  1. jeffman164

    jeffman164 Medium Load Member

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    1999 International 9200. Flashers went out completely for about a full day. About an hour from home, flashers mysteriously started working again. Flashers worked for about two weeks then stopped completely. I have power to fuse and flasher relay while flashers are activated and also while not activated. Took flasher relay out and tested with motorcycle l battery. I can hear clicks so I assume that flasher relay is good. Can flasher relay still be good with hearing clicks ? Going to buy new relay anyhow just to make sure. Am I missing something as to why flashers aren't working ?
     
    Last edited: Jun 18, 2024
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  3. FLHT

    FLHT Road Train Member

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    Aug 2, 2014
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    Was it raining ?
    Does your windshield leak ?
    Internationals seem to have a problem with water and fuse blocks.
    Moisture turns those relays green inside.
    Signal stat worn out ?
     
  4. Deezl Smoke

    Deezl Smoke Medium Load Member

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    Hillsboro Oregon
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    Ground. Always inspect and clean every grounding point you can find and even some you can't when mysterious and randomly intermittent electrical issues show up.
     
    Deere hunter Thanks this.
  5. Heavyd

    Heavyd Road Train Member

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    The flasher relay isn't really a relay, we just call it a flasher. They can act up if you have a bunch of LED lights because LEDs do not draw enough current to properly activate an old school flasher. If you have regular lights, the next spot after the flasher is the actual signal switch on your steering column. After that the power is split up to multiple circuits, so I can't see a single ground or a single power wire after the turn signal switch going bad and causing all the lights to not work. You could be losing flasher power into the turn signal switch. Power from the from flasher is wire 55A at the turn signal switch. This is big 12 gauge orange wire. The wire on the signal switch side is black. You might be losing power here, or the turn signal switch itself is going bad internally.
     
    Deere hunter Thanks this.
  6. jeffman164

    jeffman164 Medium Load Member

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    Installed new flasher switch - no go. Turns out the problem was at the connection close to the signal switch. Just unplugged and plugged back in. No green corrosion what so ever. Cleaned and applied dialectric spray. Works perfect.
    Thank you.
     
    Heavyd, Texasgordo and Deere hunter Thank this.
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