Fld120 no high beams/ signal stat diagram

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Dino soar, Jan 1, 2020.

  1. Dino soar

    Dino soar Road Train Member

    4,791
    26,878
    Dec 8, 2017
    0
    I have new headlights to put in my truck and the low beams on the outside work but the high beams on the inside are not working.

    I noticed that on the light bar the high beam indicator does not come on either.

    I do not have electricity for the high beams under the hood.

    I was wondering if there is a diagram for the signal stat ( turn signal and high beam mechanism ) so that I can manually jump the high beams and isolate the problem.
     
    Rideandrepair Thanks this.
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Dino soar

    Dino soar Road Train Member

    4,791
    26,878
    Dec 8, 2017
    0
    I just read an Old Post that said the key has to be on for the high beams to work on the FLD.

    I would never have dreamt of such a thing.

    I'll try tomorrow.
     
    Rideandrepair and spsauerland Thank this.
  4. xsetra

    xsetra Road Train Member

    5,109
    6,972
    Aug 21, 2011
    0
    Also check the connection on the signal stat. It may be loose. I have to push mine tight once in a while. I notice that when my turn signal doesn't work.
    My truck only energizes one dim light without the key on.

    Felt like a real xxxxxx after I changed 2 headlights in the rest area one night.
     
    Rideandrepair and Dino soar Thank this.
  5. kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

    10,603
    45,391
    Jan 13, 2013
    SW Arkansas
    0
    My FLDs did have to have the key on for high beams to work. Found that out during a dot inspection. The cop actually asked me if I had the key on because my high beams didn't come on.
     
    x1Heavy and Rideandrepair Thank this.
  6. Dino soar

    Dino soar Road Train Member

    4,791
    26,878
    Dec 8, 2017
    0
    Yes, the key has to be on.

    All is working now!
     
    Rideandrepair, xsetra and x1Heavy Thank this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.