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Cruise and jakes inop.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Big"E", Mar 4, 2010.

Page 1 of 2
  1. Mar 4, 2010 #1
    Big"E"

    Big"E" Bobtail Member

    8
    4
    Jan 3, 2010
    Springtown, TX
    0
    Well I have a little problem. I have an 03 Freightliner Classic XL with a DD4 12.7 500. The jakes and the cruise don't want to work most of the time. Some time if I have the jake switches on when I turn the fan on they will start to roll and work fine foe a while along with the cruise control. A while could be 5 minutes or 500 miles though. Any clue on what could be causing this? Thanks in advance.

    Eric
     
    Big"E", Mar 4, 2010
    Big"E", Mar 4, 2010
    #1
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  3. Mar 4, 2010 #2
    Dutch

    Dutch Light Load Member

    194
    58
    Nov 21, 2009
    Commiefornia
    0
    Sounds like a brake switch is stuck on
     
    Dutch, Mar 4, 2010
    Dutch, Mar 4, 2010
    #2
  4. Mar 4, 2010 #3
    Turbo45

    Turbo45 Bobtail Member

    39
    6
    Nov 16, 2009
    0
    did you try pulling up on the clutch
    the pivots on the clutch linkage might be sticky and holding the clutch down just a little bit making the clutch micro switch stay open
    it could be the clutch micro switch is on the fritz too
     
    Turbo45, Mar 4, 2010
    Turbo45, Mar 4, 2010
    #3
  5. Mar 4, 2010 #4
    112racing

    112racing Road Train Member

    1,384
    20,548
    Nov 30, 2008
    pocono's, pa
    0
    common on freightliners
     
    112racing, Mar 4, 2010
    112racing, Mar 4, 2010
    #4
  7. Mar 4, 2010 #5
    notarps4me

    notarps4me Road Train Member

    10,311
    5,253
    Jan 1, 2007
    NASA HQ
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    I had a pete that had the same problem. Sometimes they don't get up there and grease the fittings. The dealer said some have weak return springs.
     
    notarps4me, Mar 4, 2010
    notarps4me, Mar 4, 2010
    #5
    25(2)+2 Thanks this.
  8. Mar 4, 2010 #6
    25(2)+2

    25(2)+2 Trucker Forum STAFF Staff Member

    18,756
    45,806
    Sep 18, 2006
    the road less travelled
    0
    I got one once that hadn't been driven in a month or 2, and it had corrosion in most of the switches, the Jake worked but the cruise would drop out. I used solvent on all of the switches and got it working good, and then I drove it for 4 months.

    Almost anything mechanical can have problems, and many of those problems are now electrical.
     
    25(2)+2, Mar 4, 2010
    25(2)+2, Mar 4, 2010
    #6
  9. Mar 5, 2010 #7
    Big"E"

    Big"E" Bobtail Member

    8
    4
    Jan 3, 2010
    Springtown, TX
    0
    Thanks for your replies. I tried pulling up on the brake and clutch pedals and neither worked. Like I said before the weired part is sometimes when I manually turn on the engine fan with the jakes turned on they will start working. The hunt continues.
     
    Big"E", Mar 5, 2010
    Big"E", Mar 5, 2010
    #7
  10. Mar 5, 2010 #8
    Turbo45

    Turbo45 Bobtail Member

    39
    6
    Nov 16, 2009
    0
    im not familiar with Detroit stuff but i know if it was a Cat I would go to the screen on ET that shows how the ecm sees the sensors and look to see if the ecm is recognizing all the switches and functions
    im not sure if Detroit has a feature like that but im pretty sure it would
    sounds to me like it needs to get hooked on a computer
     
    Turbo45, Mar 5, 2010
    Turbo45, Mar 5, 2010
    #8
  11. Mar 5, 2010 #9
    Hardlyevr

    Hardlyevr Road Train Member

    3,270
    2,540
    Jul 30, 2009
    Mapleton Depot,PA
    0
    the trailer brake arm also has a micro switch in it that will disable the cruise, and depending on whether the jake is programmed to latch and come on when the brakes are applied may do the same thing.
     
    Hardlyevr, Mar 5, 2010
    Hardlyevr, Mar 5, 2010
    #9
  12. Mar 6, 2010 #10
    sandman1976

    sandman1976 Medium Load Member

    411
    47
    Mar 5, 2009
    burgaw,nc
    0
    my cruise is working for idle control,but not for speed control. is there a fuse in the 379 fuse box for the cruise control?
     
    sandman1976, Mar 6, 2010
    sandman1976, Mar 6, 2010
    #10
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