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  1. Jsle131

    04 NSBU wiring diagram

    The bigger pink wire goes to pin C.
  2. Jsle131

    04 NSBU wiring diagram

    A- Orange and black. B. Lt green. C. Pink. D. Black and white. E. Pink. F. Yellow. G. Drk Green.
  3. Jsle131

    NSBU help

    I replaced the 4 pin connector as well and installed the new pass through seal. Truck will engage in R and move but will not move in D. When you shift it into D the range shift inhibited message comes up on the dash. I have 19 TCM codes, I attached a picture of them. I tested pin C on the...
  4. Jsle131

    NSBU help

    It ended up being a bad 7 pin connector. Replaced it and the truck fired right up. I'm down to 24 transmission codes now and the truck still won't engage in any gear. I pulled the circle plug from the back of the transmission and it had transmission fluid in, cleaned it out with electrical...
  5. Jsle131

    NSBU help

    So if the cable isn't adjusted correctly or the cable bracket is bent it could be pushing or pulling on the switch causing a no crank situation bc the contacts inside of the switch are not grounding themselves correctly?
  6. Jsle131

    NSBU help

    I set up a bench test on the original black switch and the switch I got from Rockauto. With the black switch I hooked power to pin E, Ground to pin D, wire from pin G running to light bulb and grounded the other side of the light bulb to a battery. With the nsbu set in it's neutral position...
  7. Jsle131

    NSBU help

    Still have power at C2-E. I read the article that you posted and tried clocking the switch to see if I would get any voltage at the dark green wire. Sorry about the confusion in post #24 that should say Pin G not E. After nothing changed while moving switch around I plugged everything back in...
  8. Jsle131

    NSBU help

    I hooked my voltmeter up to Pin E on the NSBU and loosened the bolts and moved the switch around with the key turned to start to see if it would change anything, no voltage no matter what way I moved it. Plugged everything back in and the truck cranked over started. Still won't recognize when...
  9. Jsle131

    NSBU help

    I did what Ron said to do and load tested the grounds in Zone 4, light bulb was nice and bright. I have continuity between pins E&G on the switch while in park. No power at relay pins 85 and 86.
  10. Jsle131

    NSBU help

    Relay is good, truck will crank when you jump 30&87. It seems that it is not sending power back up to the relay from the NSBU.
  11. Jsle131

    NSBU help

    Yes the new switch has a little metal bracket that holds it in the neutral position. I will double-check the position of the switch, it was installed in N. I hooked a light bulb(9006 headlight) up to the C2-D ground and the battery and the light bulb was nice and bright.
  12. Jsle131

    NSBU help

    Mechanical wrong with the transmission or the NSBU switch itself? When I do the load test I'm connecting the light bulb to the ground at C2-D and a power supply correct?
  13. Jsle131

    NSBU help

    Okay, so ground C2-D directly to the battery and then measure voltage at J1-34?
  14. Jsle131

    NSBU help

    Unplugged the NSBU and hooked multimeter to negative side of the battery then probed through the ECM connector at pin 34, does that sound right?
  15. Jsle131

    NSBU help

    Their is continuity between J1 pin 34 and Pin A on the NSBU switch.
  16. Jsle131

    NSBU help

    Visually inspected the grounds in Zone 4, everything looks good. Working on either getting a power probe or building a load tester out of a light bulb. Back probed pin 34 on ECM ( orange and black wire) only getting 10v.
  17. Jsle131

    NSBU help

    Dash selector shows it's in the correct positions. NSBU was installed in Neutral. Orange and black wire at NSBU only has 10vs?
  18. Jsle131

    NSBU help

    Anyone have any ideas? I have 12v at both pink wires going to the NSBU switch with the key on but no power coming from dark green when the key is turned to start (tested at the NSBU switch). Picked up another NSBU from the Allison dealer and still having the same issue.
  19. Jsle131

    NSBU help

    My truck threw a U-joint and cracked the bell housing and rear engine cover. Put it back together and replaced NSBU and the Connectors (bought from Rockauto). Truck will not crank in P or N. If I unplug the 7 pin Connector and use a Jumper wire across pins E&G the truck will run but the...
  20. Jsle131

    04 NSBU wiring diagram

    Using the voltmeter I got the following with the key on. Orn/blk 10v with truck in P. 2 pink wires 12v all the time. Yellow wire 12v with truck in N. Lt grn and drk grn no power. Blk/wht is ground. Going off of the functions list, does the following make sense? A.orn/blk park/neutral signal...
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