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2008 F350 Headlight not working Help

Discussion in 'Ford Trucks' started by Kevin N, Jan 20, 2010.

  1. Kevin N

    Kevin N Junior Member
    from PA
    Messages: 4

    We have a 2008 F350 with a diesel engine and a fisher plow. The isolation module keeps blowing out for just one headlight. The third module bad in 5 plowings. Help! Plow shop said it is a ford problem, a spike in the electrical system that they can fix with a computer program. Does anyone have any solutions? With a new isolation module the lights work for a while then they go out on truck and plow.
  2. Green Grass

    Green Grass PlowSite Fanatic
    Messages: 9,577

    TSB 07-9-1


    2008 F-Super Duty

    2008 F-Super Duty vehicles are equipped with a smart junction box (SJB) and it's function is to provide protection against excessive current loads, typical of a short circuit, by shutting down circuit operation. The SJB strategy may interpret the switching between Ford headlamps and aftermarket snowplow headlamps, and vice-versa, as a short-to-ground, causing the power feeding a headlamp circuit through the SJB to be turned off.

    Reprogram the SJB to the latest calibration using IDS release 48.9 patch 9 and higher or 49.1 patch 1 and higher. This new calibration is not included in the VCM 2007.5 DVD. Calibration files may also be obtained at the website.

    WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
    IMPORTANT : Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.


    070901A 2008 Super Duty: 0.3 Hr.
    Reprogram The SJB (Do
    Not Use With 12650D,
    12651D, 12651D4)
  3. Kevin N

    Kevin N Junior Member
    from PA
    Messages: 4

    2008 F350 Headlampnot working Help

    Thank you very much, I will have to take it to the dealer to get fixed.
  4. Green Grass

    Green Grass PlowSite Fanatic
    Messages: 9,577

    no problem glade to help!!
  5. Kevin N

    Kevin N Junior Member
    from PA
    Messages: 4

    2008 F350 Headlamp not working Help

    I did not get to ford dealer yet but I was thinking, would that cause the isolation module to go bad, and why is it just one headlight?
  6. Gumpy52

    Gumpy52 Member
    Messages: 70

    On the older Supeduty, Ford fuses each headlight seperately, I don.t know much about the smart fuse box, but just a thought.