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MESO V5 DRL incab "connection"

Discussion in '3rd Gen. Tacomas (2016+)' started by caribe makaira, Oct 2, 2021.

  1. Oct 2, 2021 at 2:23 AM
    #1
    caribe makaira

    caribe makaira [OP] Well-Known Member

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    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    Overall
    upload_2021-10-2_5-7-42.jpg
    Vehicle DRL circuit, connector 1F pin 30 at Main Body ECU
    upload_2021-10-2_5-10-52.jpg
    Bright side
    upload_2021-10-2_5-8-17.jpg
    Dim side
    upload_2021-10-2_5-11-21.jpg
    Relays, coil Low activated (negatively/ground) by DRL 1F_30 tie
    upload_2021-10-2_5-13-4.jpg
    Relays actuated by tie to Unlock/Door Open cab illumination circuit.
    upload_2021-10-2_14-25-59.jpg
    Upon unlock (Most Tacoma versions) Headlight DRL and V5 Bright DRL are ON. Same for when Door Open input (x1~4) is received to main Body ECU.
    Diodes are there to prevent feedback to Main Body ECU.

    For entertainment purposes only, no warranties offered or implied, for Mall use only, void where prohibited, non-commercial use only.
     
    Last edited: Oct 2, 2021
  2. Oct 2, 2021 at 11:53 AM
    #2
    caribe makaira

    caribe makaira [OP] Well-Known Member

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  3. Oct 2, 2021 at 12:19 PM
    #3
    caribe makaira

    caribe makaira [OP] Well-Known Member

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    Simplest:
    upload_2021-10-2_15-19-40.jpg
     
  4. Oct 2, 2021 at 1:07 PM
    #4
    lylefk

    lylefk Well-Known Member

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    Nice, but seems simpler to me to just go through the firewall and directly to the headlights. :notsure:
     
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  5. Oct 2, 2021 at 1:14 PM
    #5
    caribe makaira

    caribe makaira [OP] Well-Known Member

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  6. Oct 2, 2021 at 1:15 PM
    #6
    lylefk

    lylefk Well-Known Member

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    That’s fair I guess
     
  7. Oct 2, 2021 at 2:15 PM
    #7
    caribe makaira

    caribe makaira [OP] Well-Known Member

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    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    This install provides the V5 a parallel function with the Headlight DRL and all controlled by the DRL select position on the light stalk (if present).
    upload_2021-10-3_13-25-48.jpgupload_2021-10-3_13-33-43.jpg
    Also, for those with SR (and contemplating on adding the mirror turn signals), the terminal at 1F_30 is active too, so a wire that can wedge into the space will do (still working on finding correct terminal and source)
     
    Last edited: Oct 3, 2021
  8. Oct 2, 2021 at 3:34 PM
    #8
    lylefk

    lylefk Well-Known Member

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    Same as going to the *led headlight, right?
     
  9. Oct 2, 2021 at 3:35 PM
    #9
    caribe makaira

    caribe makaira [OP] Well-Known Member

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    Nope
     
  10. Oct 2, 2021 at 3:37 PM
    #10
    lylefk

    lylefk Well-Known Member

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    That’s a surprise… @daveeasa your harness doesn’t provide the full drl functionality from the stalk? Thought it did.
     
  11. Oct 2, 2021 at 3:41 PM
    #11
    caribe makaira

    caribe makaira [OP] Well-Known Member

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    read post #7..slowly...
     
  12. Oct 2, 2021 at 3:42 PM
    #12
    lylefk

    lylefk Well-Known Member

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    I read it, perhaps you can explain the difference?
     
  13. Oct 2, 2021 at 3:43 PM
    #13
    daveeasa

    daveeasa Slowest crimp in the West

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    Caribe is saying no to the question of “is it the same”. Perhaps a better question is “does it behave the same?” However the answer is still a bit of a no. The ECU controls the DRL signal such that if you start the truck and leave parking brake engaged, headlight DRL is off even if stalk is DRL.

    For layman’s terms it’s close enough to match expectations. But it’s not “the same”. Adds a relay but eliminates need to run through the firewall.
     
  14. Oct 2, 2021 at 3:45 PM
    #14
    caribe makaira

    caribe makaira [OP] Well-Known Member

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    Think Te Fiti & Te Ka...
    Difference on headlamp T is the DIM input to V5 happens before Low beams are selected. So you get Bright DRL at the Headlights and DIM at the V5..that is all.
     
  15. Oct 2, 2021 at 3:46 PM
    #15
    daveeasa

    daveeasa Slowest crimp in the West

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    Oh but nice move to add the cargo / unlock part! Well done @caribe makaira
     
  16. Oct 2, 2021 at 3:47 PM
    #16
    caribe makaira

    caribe makaira [OP] Well-Known Member

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    Maui would luv da Taco in Lahaina doing dat...
     
    Last edited: Oct 2, 2021
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  17. Oct 2, 2021 at 3:48 PM
    #17
    daveeasa

    daveeasa Slowest crimp in the West

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    I will check this on the truck, stalk to parking lights? Pretty sure headlights dim. I suspect you know better than me though.
     
  18. Oct 2, 2021 at 3:51 PM
    #18
    caribe makaira

    caribe makaira [OP] Well-Known Member

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    Verified many times, that is why the diode is in place for the grill lights. So many crimps and exposure to materials that may cause illness...has its effects on the memory:burp:
     
    daveeasa likes this.
  19. Oct 2, 2021 at 3:52 PM
    #19
    lylefk

    lylefk Well-Known Member

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    Just getting to the beach with the fam, I’ll give this a read when I have time to process it lol. Thanks
     
  20. Oct 2, 2021 at 3:56 PM
    #20
    daveeasa

    daveeasa Slowest crimp in the West

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    So +1 on verifications. Interesting bit of trivia. I didn’t realize this before today. I though DRL from ECU goes off with parking lights on.

    I suppose the mirrors matching the headlights offers the best symmetry. But not sure I like this behavior for either.
     

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