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04 with Electrical issues!

Discussion in '1st Gen Tundras (2000-2006)' started by Tecsol1, Oct 17, 2020.

  1. Oct 17, 2020 at 4:05 PM
    #1
    Tecsol1

    Tecsol1 [OP] New Member

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    Evening folks, have a real strange issue here, was putting a new exhaust system, manifolds back.


    My battery was dead when I finished and threw the charger on for a day.


    Next day I see that the head lights are on, no parking lights(stalk switch is turned off), dash trouble indicators, VSC, seat belt indicator, air bag indicator and such are all on, WITHOUT A KEY IN THE IGNITION OR TURNED ON!


    Truck starts, runs and turns off normally....


    Also with the key off and out of the ignition, the power windows will work if pressed...


    Have gone through my service manual and schematics but don't see anything that sticks out as the issue.


    Disconnect the ignition switch and nothing changes.


    This is really breaking my butt off!

    Have checked the archives and don't see the same issue mentioned.


    Anyone else have this issue!!!!!


    TIA!
     
    YardBird likes this.
  2. Oct 17, 2020 at 5:05 PM
    #2
    SouthPaw

    SouthPaw The headlight guy

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    Did you remove any wiring to work on the truck? The main battery ground is bolted to the side of the engine block and maybe it got disturbed?

    As always, check all fuses first and make sure cables are clean/tight. If the battery is dead, get it tested to see if it’s even holding a good charge. After that, start tracing your steps and see what might have been moved.
     
  3. Oct 17, 2020 at 6:03 PM
    #3
    Tecsol1

    Tecsol1 [OP] New Member

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    No wires removed other than O2's
    Battery is fully charged and good
     
  4. Oct 17, 2020 at 6:20 PM
    #4
    YardBird

    YardBird Native San Diegan

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    American Thunder Cat Back ~ Retrax Pro ~ Toyota Bed Mat ~ OEM Split Spoke Wheels
    Welcome aboard from SoCal.
    SC.jpg
     
  5. Oct 17, 2020 at 7:04 PM
    #5
    artsr2002

    artsr2002 2005 Tundra DC SR5

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    Your truck is possessed too!
     
    bmf4069 likes this.
  6. Oct 18, 2020 at 4:42 AM
    #6
    Tecsol1

    Tecsol1 [OP] New Member

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    Gee, thanks!
     
  7. Oct 18, 2020 at 7:59 AM
    #7
    10 blue trucks

    10 blue trucks New Member

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    Accessories receiving constant 12v. Where did you disconnect ignition switch? At the column or at the fuse box?
     
  8. Oct 18, 2020 at 8:07 AM
    #8
    10 blue trucks

    10 blue trucks New Member

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    The acc on wire, is close to constant 12v in the column, and all that mess is in a tight space subject to chafing with steering wheel movement if anything is out of place.
     
  9. Oct 18, 2020 at 8:24 AM
    #9
    10 blue trucks

    10 blue trucks New Member

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    any aftermarket wiring in the dash region?
     
  10. Oct 18, 2020 at 9:34 AM
    #10
    Tecsol1

    Tecsol1 [OP] New Member

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    At the switch...
     
  11. Oct 18, 2020 at 9:35 AM
    #11
    Tecsol1

    Tecsol1 [OP] New Member

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    A Meyers plow that was installed at the dealer when it was new
     
  12. Oct 18, 2020 at 9:41 AM
    #12
    Tecsol1

    Tecsol1 [OP] New Member

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    Integration relay maybe???? Where is it?
     
  13. Oct 18, 2020 at 9:46 AM
    #13
    10 blue trucks

    10 blue trucks New Member

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    A plow, huh, snow = salt. bummer, Step one pull the main fuse for the plow electric at the battery. Rule out whether or not it is powering your accessories. If the headlights stay on, pull your headlight relays, see if the dash lights are still on. Then start pulling fuses for full time 12v like the horn fuse etc. See if you can narrow it down to a smaller set of wires so you don't have to trace all of them.
     
  14. Oct 18, 2020 at 9:51 AM
    #14
    Tecsol1

    Tecsol1 [OP] New Member

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    Yeah have isolated the plow out of the equation and it doesn't change anything.
    Have pulled every relay inside and out without change to the dash indicators being on!
    Only effect was the headlight relay.....
     
  15. Oct 18, 2020 at 9:57 AM
    #15
    10 blue trucks

    10 blue trucks New Member

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    and every fuse?
     
  16. Oct 18, 2020 at 10:00 AM
    #16
    10 blue trucks

    10 blue trucks New Member

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    effect being headlights off? or dash lights off? or what?
     
  17. Oct 18, 2020 at 10:02 AM
    #17
    Tecsol1

    Tecsol1 [OP] New Member

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    no, on the docket for today!
    AND run a scanner....
    headlight goes off, no change in dash indicators or other accessories
     
  18. Oct 18, 2020 at 10:15 AM
    #18
    10 blue trucks

    10 blue trucks New Member

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    when time allows I would isolate the circuit. YMMV
     
  19. Oct 18, 2020 at 10:19 AM
    #19
    10 blue trucks

    10 blue trucks New Member

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    Find and pull the dashlight fuse with the window and headlight relays in. Which of the three work:?
     
  20. Oct 19, 2020 at 7:49 AM
    #20
    10 blue trucks

    10 blue trucks New Member

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    perhaps this matches your model.
     

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  21. Oct 19, 2020 at 8:32 AM
    #21
    Tecsol1

    Tecsol1 [OP] New Member

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    Thanks, no I have the one for Double cab, but thanks! I have that one!
     
  22. Oct 19, 2020 at 8:44 AM
    #22
    Tecsol1

    Tecsol1 [OP] New Member

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    Pulled every fuse today, The dash indicators go off when the Gauge or the ECU-ign fuses are pulled, but the headlights don't go out and the power windows and most other accessories work at the same time!
     
  23. Oct 20, 2020 at 11:51 AM
    #23
    Tecsol1

    Tecsol1 [OP] New Member

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    I have opted to replace the cabin fuse panel with the integration relay assembly, we'll see! The power has to be passing to the accessory circuits and power windows.
     
  24. Oct 20, 2020 at 6:26 PM
    #24
    10 blue trucks

    10 blue trucks New Member

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    always a freak show when you have a short but the load is still in place. Did you unplug the rear plug on the integrator panel that goes to the key switch, while leaving the others all connected?
     
  25. Oct 21, 2020 at 5:15 AM
    #25
    Tecsol1

    Tecsol1 [OP] New Member

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    The only connector that was effective was the connector to the engine compartment, when removed that was impacting on the issue!
     
  26. Oct 21, 2020 at 9:35 AM
    #26
    SouthPaw

    SouthPaw The headlight guy

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    So that was your issue and it is now fixed?
     
  27. Oct 21, 2020 at 9:42 AM
    #27
    Tecsol1

    Tecsol1 [OP] New Member

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    Waiting for the fuse module now!
     
  28. Oct 23, 2020 at 7:06 AM
    #28
    Tecsol1

    Tecsol1 [OP] New Member

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    Well, it wasn't the cabin module!!!

    Decided to take a look at the engine bat module for the fusible links, took apart the R/B no1 and 2 modules..... MOUSE NEST!!!!

    12 chewed and uninsulated wires!!!!

    Now the problem is 4 of the connectors on R/B 2 are all keyed the same and there wasn't a way to take a picture of the connections with the way the panel comes apart!!!!

    The service manual shows relays/fuse modules show a connector view with the exception of this module!!!!!!

    Have to determine the proper location correctly now!!!!! JJEEEZZZZ!!!!!!!!
     

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