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98 4964fx blinker output low voltage

Discussion in 'Western Star Forum' started by Derek Leo, Jul 18, 2015.

  1. Jul 18, 2015 #1
    Derek Leo

    Derek Leo Bobtail Member

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    Jul 12, 2015
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    I changed my directionals to LED, and they wont flash because the ecc is only putting out around 7v to the blinker switch. If I hook up a regular 1157 bulb to the line, it will flash, but the output is still around 7v. any ideas?
     
    Derek Leo, Jul 18, 2015
    Derek Leo, Jul 18, 2015
    #1
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  3. Jul 18, 2015 #2
    Cetane+

    Cetane+ Road Train Member

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    Lol isn't this the age old incandescent to led problem
     
    Cetane+, Jul 18, 2015
    Cetane+, Jul 18, 2015
    #2
  4. Jul 18, 2015 #3
    Derek Leo

    Derek Leo Bobtail Member

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    Jul 12, 2015
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    I thought the same thing, and installed a regular light back in line. the power to the blinker wire is still 7v, and the leds wont flash with only 7v. I have traced the power all the way back to the box behind the dash, and there is 12v in and only 7v out.
     
    Derek Leo, Jul 18, 2015
    Derek Leo, Jul 18, 2015
    #3
  5. Jul 18, 2015 #4
    Cetane+

    Cetane+ Road Train Member

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    So do the incandescent flash? If they do you're going to have to leave one incandescent in the system to make it work. That's how I had to do mine
     
    Cetane+, Jul 18, 2015
    Cetane+, Jul 18, 2015
    #4
  7. Jul 18, 2015 #5
    Alaska76

    Alaska76 Road Train Member

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    What is this "box behind the dash" that you speak of? Is it a relay? A control module? The fuse block?
     
    Alaska76, Jul 18, 2015
    Alaska76, Jul 18, 2015
    #5
  8. Jul 18, 2015 #6
    DL550CAT

    DL550CAT Road Train Member

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    Probably just low on fluid.



    Kidding aside sounds like you have the old style hd flasher. It may be as simple as unplugging it and plugging in a new style flasher. When you you see the difference between the two you may ask is this right? There is a big difference between them.
     
    DL550CAT, Jul 18, 2015
    DL550CAT, Jul 18, 2015
    #6
  9. Jul 19, 2015 #7
    Derek Leo

    Derek Leo Bobtail Member

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    Jul 12, 2015
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    the flasher is inside the box behind the dash, which is the electronic control center. It does not have an external flasher. I have a few trucks that I have changed the flasher to an LED flasher and it cures the problem.I eliminated all the LEDs, hooked up old style lights, and the flasher is still only putting out 6-7v.
     
    Derek Leo, Jul 19, 2015
    Derek Leo, Jul 19, 2015
    #7
  10. Jul 19, 2015 #8
    Cetane+

    Cetane+ Road Train Member

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    So volts aside, it still flashes? The volts are confusing you. The ECC does not work the way you think. The ECC designed in 1996 cannot work with LED lights. I told you the answer that's the best you can get. Or you can try buying 4 or 5 brand new EEC's and see where your money goes.
     
    Cetane+, Jul 19, 2015
    Cetane+, Jul 19, 2015
    #8
  11. Sep 2, 2015 #9
    RandyLAROSE

    RandyLAROSE Bobtail Member

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    May 15, 2015
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    I had the same problem do what the one guy suggested wire in an incandescent light and hide it somewhere problem solved that is what I did and hide it in the light bar ...
     
    RandyLAROSE, Sep 2, 2015
    RandyLAROSE, Sep 2, 2015
    #9
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