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F250 no brake lights or running lights blinkers weak all fuses good

Found 1 bulb out changed it and also changed flash relay inside dash.

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  • 52 Answers

Its probably the parking light switch on the dash, press the break pedal and see if your break lights work, there usually ran off of a switch on your pedal. if so i would say its the switch on the dash shorted out

Posted on Jan 03, 2013

  • Terry t Jan 03, 2013

    The brakes do not come on when you press the pedal. I have all my front lights just no rear

  • madmaxx Jan 03, 2013

    look on your break pedal arm and you should see a little plastic box with some wires connected to it. try moving it while someone stands behind it and see if its that switch, it wont move very much



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SOURCE: my 03 monte tail lights

I would start by checking the headlight switch on the dash. You can brighten and dim the lights on the dash with a switch. Usually when just the dash lights go out then it is this switch.

Posted on Sep 18, 2010

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I have no blinkers or brake lights on my 2010 kenworth 900 deisal I have already replaced the blinker switch but nothing fuses under the dash are good also

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My signal light wont blink but it comes on, how do i change it or where to start to fix the problem

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Where is the flasher relay unit

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manual headlamps

Visual Inspection Chart
Mechanical Electrical
  • Headlamp switch
  • Multifunction switch
  • Central junction box (CJB) fuse:
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    • 30 (15A)
    • 46 (10A)
    • 47 (10A)
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Visual Inspection Chart Mechanical Electrical
  • Headlamp switch
  • Central junction box (CJB) fuses:
    • 19 (5A)
    • 56 (30A)
  • Circuitry
  • Headlamp bulb
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If autolamp system, Vehicle security module has a headlamp rela inside of it. under left side of dash.

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