International 9400I

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by LeviTrucker, Jan 30, 2026.

  1. Jan 30, 2026 #1
    LeviTrucker

    LeviTrucker Bobtail Member

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    International 9400I I turn off the dash light and head light switch, dash lights stay on on the truck side not trailer weird. Also if I shut my truck off then then dash lights shut off with the ignition…Any advice would be kindly.
     
    LeviTrucker, Jan 30, 2026
    LeviTrucker, Jan 30, 2026
    #1
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  3. Jan 30, 2026 #2
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    New to you truck, or have you had it a while and this just started?
     
    Big Road Skateboard, Jan 30, 2026
    Big Road Skateboard, Jan 30, 2026
    #2
  4. Jan 30, 2026 #3
    LeviTrucker

    LeviTrucker Bobtail Member

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    I’ve had it for a while just started
     
    LeviTrucker, Jan 30, 2026
    LeviTrucker, Jan 30, 2026
    #3
  5. Jan 30, 2026 #4
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    I don't have tons of experience with the 9900's, but that info might help someone who knows more.

    I'd start with looking for a stuck relay.
     
    Big Road Skateboard, Jan 30, 2026
    Big Road Skateboard, Jan 30, 2026
    #4
  7. Jan 30, 2026 #5
    LeviTrucker

    LeviTrucker Bobtail Member

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    It’s a 9400I Changed them tested them all, lights will shut off if I manually pull the fuse or turn off the ignition. Other then that they stay on
     
    LeviTrucker, Jan 30, 2026
    LeviTrucker, Jan 30, 2026
    #5
  8. Jan 30, 2026 #6
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    I'd bet you might have a switch then that has gotten hot. Have you pulled the dash and looked at the plug?
     
    Big Road Skateboard, Jan 30, 2026
    Big Road Skateboard, Jan 30, 2026
    #6
  9. Jan 30, 2026 #7
    LeviTrucker

    LeviTrucker Bobtail Member

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    I unplugged both switches dash lights stay on still. Driving me up a wall haha.
     
    LeviTrucker, Jan 30, 2026
    LeviTrucker, Jan 30, 2026
    #7
  10. Jan 31, 2026 #8
    Heavyd

    Heavyd Road Train Member

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    Which fuse are you pulling to kill it?
     
    Heavyd, Jan 31, 2026
    Heavyd, Jan 31, 2026
    #8
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