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dvleemin's avatar
dvleemin
Explorer
Jul 27, 2017

No signal lights, headlights, docking lights, fog lights

So yesterday I was about to leave on a trip and started up my 2005 Itasca Horizon 40ad and the signal lights, brake lights, docking lights all don't work. So I went to the fuse panel for the chassis and there's no burnt out fuses, and none of the pop out breakers are tripped. Given that a bunch of lights aren't working, I have to believe its a common power supply issue - maybe a primary breaker. But I cannot find it or figure it out. Does anyone have any ideas?

Thanks,

Darryl
Class A

30 Replies

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  • 1995brave's avatar
    1995brave
    Nomad
    Jul 27, 2017
    There are other drawings on the placement of each item. Download everything and then just start going though each drawing. In a few minutes you will understand what drawing has what. Save them, print them, and put them in the RV. If you get stuck, there are some people on here that know how to read them and can help.

    Edit: Including me.
  • dvleemin's avatar
    dvleemin
    Explorer
    Jul 27, 2017
    1995brave wrote:
    Since it is a Winnebago product did you download the wiring diagrams for your RV? You can then trace the wiring back to a common connection, I.E. Headlight switch, circuit breaker, or fuse for lights.


    Good point - I can try and do that. Not super skilled at reading those diagrams, and if I remember correctly last time I looked at it, it doesn't tell me where things are physically located.
  • dvleemin's avatar
    dvleemin
    Explorer
    Jul 27, 2017
    hostage wrote:
    dvleemin wrote:
    So yesterday I was about to leave on a trip and started up my 2005 Itasca Horizon 40ad and the signal lights, brake lights, docking lights all don't work. So I went to the fuse panel for the chassis and there's no burnt out fuses, and none of the pop out breakers are tripped. Given that a bunch of lights aren't working, I have to believe its a common power supply issue - maybe a primary breaker. But I cannot find it or figure it out. Does anyone have any ideas?

    Thanks,

    Darryl

    very strange the brake lites and signals are sometimes the same circuit but headlights are different circuit and the dock lights are different circuit;; power supplys are usually different and power usually serves many things besides lites etc ;; I wonder if there a relay somewhere that supplys common power


    And the headlights are also not working . . .
  • hostage's avatar
    hostage
    Explorer
    Jul 27, 2017
    jjjandrbaker wrote:
    I had the same problem in my last camper. I hitched up, plugged in, and nothing. The man at the site next to me said to unplug the power cord and blow into it. I did. It worked. Worth a try?????


    what would that have to do with persons 40 ft motor home that the brake and turn and headlites quit working?
  • jjjandrbaker's avatar
    jjjandrbaker
    Explorer
    Jul 27, 2017
    I had the same problem in my last camper. I hitched up, plugged in, and nothing. The man at the site next to me said to unplug the power cord and blow into it. I did. It worked. Worth a try?????
  • hostage's avatar
    hostage
    Explorer
    Jul 27, 2017
    dvleemin wrote:
    So yesterday I was about to leave on a trip and started up my 2005 Itasca Horizon 40ad and the signal lights, brake lights, docking lights all don't work. So I went to the fuse panel for the chassis and there's no burnt out fuses, and none of the pop out breakers are tripped. Given that a bunch of lights aren't working, I have to believe its a common power supply issue - maybe a primary breaker. But I cannot find it or figure it out. Does anyone have any ideas?

    Thanks,

    Darryl

    very strange the brake lites and signals are sometimes the same circuit but headlights are different circuit and the dock lights are different circuit;; power supplys are usually different and power usually serves many things besides lites etc ;; I wonder if there a relay somewhere that supplys common power
  • 1995brave's avatar
    1995brave
    Nomad
    Jul 27, 2017
    Since it is a Winnebago product did you download the wiring diagrams for your RV? You can then trace the wiring back to a common connection, I.E. Headlight switch, circuit breaker, or fuse for lights.
  • dvleemin's avatar
    dvleemin
    Explorer
    Jul 27, 2017
    GHOST1750 wrote:
    I had the same thing happen, it was 2 fuses. Did you try changing the fuses or just looked at them, sometimes you can't tell by looking. In my case it was the cable between the tow car and motor home was shorted out causing the fuses to blow.


    Hi,
    The issue isn't with anything being towed though - its with the MH itself.

    Darryl
  • GHOST1750's avatar
    GHOST1750
    Explorer
    Jul 27, 2017
    I had the same thing happen, it was 2 fuses. Did you try changing the fuses or just looked at them, sometimes you can't tell by looking. In my case it was the cable between the tow car and motor home was shorted out causing the fuses to blow.

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