Recent content by 2004LB7

  1. 2004LB7

    June '23 Chat - Will the BBT be in the wedding?

    We should do a diesel power challenge type gathering. Bring what you got and play around. If we can't get ahold of a sled that's fine we can figure out other challenges. Towing obstacle course, trailer drag race, maybe some others. Looks like Tom's got a good sized yard we could tear up 😁 Of...
  2. 2004LB7

    LLY FICM

    I'm pretty sure it's 2x 120 ohms. One on each end for a sum of 60 ohms on both the LB7 and the LLY
  3. 2004LB7

    LLY FICM

    The comms for both are labeled "J1939" with low on pin J2-90 and high for J2-91 Because of this I assume it's a different language. Or maybe dialect 😛
  4. 2004LB7

    LLY FICM

    That's what I'm thinking. Does the ECM even need to know the FICM is there? Doesn't the ECM quarry the com lines when powered up to see what's connected? So if you where to disconnect the FICM communication wires and power cycle the vehicle by disconnecting the batteries. Then the ECM wouldn't...
  5. 2004LB7

    LLY FICM

    So I just crossed referenced the pinout for both the LB7 and LLY FICMs. They are identical. Anyone ever tried plugging in an LB7 FICM into an LLY to see if it will run? Edit, thos may have answered my question https://www.duramaxdiesels.com/forum/threads/ficms-swappable.39078/
  6. 2004LB7

    Looking for Speakers

    When I did mine, I bypassed the Boss amp and installed my own amplifier. If I remember correctly, it was four channels. Basically front, rear, left and right. The rears have the woofers in the doors and the fronts have the tweeters along with the mids. There is also four discreet balanced line...
  7. 2004LB7

    LB7 FICM

    Ordered. I'll PM you the information
  8. 2004LB7

    LLY FICM

    From what I've gathered on the internet. It seems most vehicles will use a PWM signal to drive the injector controller module. The duty cycle is the duration of the PW. If it's the same for the Duramax then that is good. The LM1949 chip can accept PWM and translate that to injector on time. I...
  9. 2004LB7

    Engine Codes while towing Heavy.

    That Autel probably has the test function for both
    • 2004LB7
    • Post #8
    • Forum: LLY
  10. 2004LB7

    Engine Codes while towing Heavy.

    I wouldn't worry about those U codes unless they are persistent or seem to cause issues. I'd clear them and see if they come back I'd definitely look into the P2563 & P0847 codes. The C codes could be from a bad ABS sensor or wheel hub. Could have been the cause of the weird shifting you...
    • 2004LB7
    • Post #6
    • Forum: LLY
  11. 2004LB7

    LB7 FICM

    I have enough capacitors to do one more before needing to purchase more. They come in packages of ten for about $20. Let me know what you want to do
  12. 2004LB7

    LLY FICM

    Almost done with this FICM repair. Did some carful removal of the charred board and traces. Jumped out the burned pathways. And soldered in some new 50 volt capacitors (old ones were only rated to 14 volts). I also moved the other capacitors directly off the board to limit the chances of them...
  13. 2004LB7

    LB7 FICM

    I decided to replace the electrolytic capacitors as they are now about 20 years old with who knows how many miles and heat cycles on them. Plus with the other recent thread from GregJ77 where he had his capacitors blow out and burn the board made me think it was probably a good idea Old caps...
  14. 2004LB7

    1/8 mile discussion and time slips post here!

    Looks pretty good. Only found a few formatting errors that you don't see right away when looking at the list but show up when copying and pasting from the excel sheet. all fixed. I also added the hyperlinks to the timeslips you put in, into my excel sheet so I don't accidently erase them from...
  15. 2004LB7

    June '23 Chat - Will the BBT be in the wedding?

    As mentioned earlier, those are going to be the moments you will remember the most. Good times 😅
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