99 9900 odometer issue.

Discussion in 'International Forum' started by kwswan, Aug 16, 2021.

  1. kwswan

    kwswan Road Train Member

    1,492
    6,887
    Jul 26, 2009
    mcminnville,tn.
    0
    I replaced the speedometer in my truck because the odometer quit working. The replacement odometer resets to 0 when the key is switched off. What is causing this? Odometer works when driving but like I said before, it resets to 0 when switched off. But the trip meter resets to the mileage that was previously on it.
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Heavyd

    Heavyd Road Train Member

    7,250
    5,446
    Feb 4, 2009
    0
    At the back of the speedo module, look at the white connector. In cavity #9 should be wire #14G which is an 18 gauge red wire. This should have power all the time. This is needed for the odometer to have power after key off to write the current mileage to memory so it is saved for the next key on. This is powered from fuse F5-C, 15 amp. If the power is here, then your whole speed module needs to be replaced because this is where the data is processed and stored in memory.
     
    QUALITYTRUCK and kwswan Thank this.
  4. kwswan

    kwswan Road Train Member

    1,492
    6,887
    Jul 26, 2009
    mcminnville,tn.
    0
    I have power on the red wire. When I turn the key on the odometer shows 549,429,then resets to zero. The trip meter shows 96,357.7.You can reset it to zero.
    The odometer & trip meter both register mileage going down the road,but then both reset to the mileage I mentioned. I bought a used dash panel & swapped it out with mine. This came from a trk. with a Cat engine. Mine has a Detroit. Would this matter? Also it is from a 04-05 model where mine is a 99.
    I know the odometer can be unplugged & removed,but can you buy it separately from the rest of the module? Would this fix my problem or is the memory somewhere else? Thanks.
     
    Last edited: Aug 20, 2021
  5. Heavyd

    Heavyd Road Train Member

    7,250
    5,446
    Feb 4, 2009
    0
    The cluster should be the same as all electronic engines send signals over a datalink that is universal along with those model years. Make sure the dip switches are all set the same between your new one and old one. I believe with electronic engines, the dips switches are all set to 0 anyway. I don't know if the module can be ordered without the odometer or not. The memory for it is in the module itself, not the odometer.
     
    kwswan Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  • Draft saved Draft deleted