Bad switch or beacon lights

Discussion in 'Ask An Owner Operator' started by Wyoming Jim, Oct 2, 2022.

  1. Wyoming Jim

    Wyoming Jim Bobtail Member

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    My beacon lights on my '17 389 just stopped working. When I tap on the left light, it briefly flashes once, then stops. I've checked out the fuses both inside the truck and under the hood. They're all good. So, 1) what is the chance it's the rocker switch? 2) How do I check to see if the switch is bad). Thanks in advance.
     
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  3. InTooDeep

    InTooDeep Donner party survivor

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    If it flashes when you tap on it I would say the light is your problem
     
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  4. D.Tibbitt

    D.Tibbitt Road Train Member

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    Take a test light, ground the wire then tap the power wire with the test light . if test light comes on, then wire is good and beacon light is going out... If test light doesnt flash, then either u dont have a good ground for the test light or ur wire is bad. To find if u have a bad ground, probe a known wire that has power in the area until u find a good ground, then use that to probe the beacon light wire... Then u trace the wire back to where it goes , and repeat test until u find the problem..
     
  5. abyliks

    abyliks Road Train Member

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  6. Wyoming Jim

    Wyoming Jim Bobtail Member

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    Thanks. I appreciate the advice.
     
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  7. fortycalglock

    fortycalglock Road Train Member

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    If you tapped the beacon and it lit up, it’s the beacon or connection at the beacon. Why would you think it’s the switch?
     
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  8. Numb

    Numb Crusty Curmudgeon

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    beacon light?

    never heard that term before.

    the directional light, right?
     
  9. abyliks

    abyliks Road Train Member

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    amber stobe that’s about twice the size of a beer can
     
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