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All lights stay on 2000 Freightliner FLD

Discussion in 'Freightliner Forum' started by urgentcare, Mar 5, 2018.

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  1. Mar 5, 2018 #1
    urgentcare

    urgentcare Bobtail Member

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    Mar 5, 2018
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    All my lights will come on by them self even just sitting in driveway over night. Lights work fine when I use them but sometimes won't shut off by switch. Where to start? 2000 Freightliner FLD Day Cab.
     
    Last edited: Mar 5, 2018
    urgentcare, Mar 5, 2018
    urgentcare, Mar 5, 2018
    #1
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  3. Mar 5, 2018 #2
    pmdriver

    pmdriver Road Train Member

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    Do you have a remote that opens your door locks and a alarm? Check the battery in that cursed thing.
     
    pmdriver, Mar 5, 2018
    pmdriver, Mar 5, 2018
    #2
  4. Mar 5, 2018 #3
    urgentcare

    urgentcare Bobtail Member

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    Mar 5, 2018
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    I don't have a remote. I guess I could have told you what it is. 2000 Freightliner FLD Day cab.
     
    urgentcare, Mar 5, 2018
    urgentcare, Mar 5, 2018
    #3
  5. Mar 5, 2018 #4
    pmdriver

    pmdriver Road Train Member

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    Then if you in a area that you run into that mag chloride it has very corrosive problems on wires and electrical units.
     
    pmdriver, Mar 5, 2018
    pmdriver, Mar 5, 2018
    #4
  7. Mar 5, 2018 #5
    AModelCat

    AModelCat Road Train Member

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    First thing that comes to my mind is the relay is sticking closed.

    Second thing is your switch could be sticking closed.

    Third thing that comes to mind is the light circuit has a short to power somewhere.
     
    AModelCat, Mar 5, 2018
    AModelCat, Mar 5, 2018
    #5
    BoxCarKidd Thanks this.
  8. Mar 5, 2018 #6
    urgentcare

    urgentcare Bobtail Member

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    Mar 5, 2018
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    Don't think we mag chloride in Memphis that I know of.
     
    urgentcare, Mar 5, 2018
    urgentcare, Mar 5, 2018
    #6
  9. Mar 5, 2018 #7
    urgentcare

    urgentcare Bobtail Member

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    Mar 5, 2018
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    I was thinking about replacing relay, headlight & interrupt switches. I have to disconnect my ground wire at batteries at night so if they won't run down.
     
    urgentcare, Mar 5, 2018
    urgentcare, Mar 5, 2018
    #7
  10. Mar 5, 2018 #8
    spyder7723

    spyder7723 Road Train Member

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    Under 10 bucks for the toggle switch. Start there.
     
    spyder7723, Mar 5, 2018
    spyder7723, Mar 5, 2018
    #8
  11. Mar 5, 2018 #9
    urgentcare

    urgentcare Bobtail Member

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    Mar 5, 2018
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    Ordered interrupt switch, they have headlight switch in stock. I have had both switches unplugged and all lights went out. When it was cold outside truck wouldn't crank. Ended up being loose ground at frame from batteries. No problem with lights for about a month. Lights started acting up last week. checked all grounds and they are tight.
     
    urgentcare, Mar 5, 2018
    urgentcare, Mar 5, 2018
    #9
  12. Mar 5, 2018 #10
    speedyk

    speedyk Road Train Member

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    Of you can access the guts of the switches and they are mechanical with contacts, some Caig DeOxit sprayed in the switches might resolve the issue. Use when depowered and work the switches back and forth to clean the contacts in the DeOxit. $15 for a small can but very little needed, set the nozzle to the slowest setting and the can will last.

    Also, they make battery cutoff switches, even remote ones. Might be handy even if you resolve this issue.
     
    speedyk, Mar 5, 2018
    speedyk, Mar 5, 2018
    #10
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